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540 ALGEBRAEJERCICIO 25 . 1 . - 1a2-2 a. 2 . 1'a+ 33 b-5 .24 c 25 . - 1rn-1n+ á p . 6. --a3 + 5 a3+G a2b+ ó ab--19 .3 c _ 6 3 8 38.3 . X3- 1 x 2y-6 . 4 . 1 a+ 7b- --c °9 2 4 .37 . M4+ 2 rn3n-29m2n2+ 5 mn3-6 .11 56 92X 5- -X 4y- _X 3y 2+ 3X2y3+24Xy4-78 . 9 . -x 0 + -x 5y+b X4y2- H x3 y8- ii x2y4+ 13y 6 .10 . x3--x 2 y s xy 2 -y3-3 . 11 .4,c3d2+ 2c2d3-4 cd4-32 d5 -35 .2 7rf 6 +l 3 m4n2- 11 m2n4+ 2n 6 + 8 . 12 .8 c+ 17 c4d+13 20 14 9 5 8 22EJERCICIO 26 . 1 . a 2-4ab-b 2 ; -11. 2 . a3 +5a 2b-6ab 2+3b 3 ; 11 . 3 . --i z a-2b+6c ; 31.3 24 . 2M 2 -8rnn-15n 2 ; - `7 • 5 . x 4 +16x 3y-18x 2y2 +6xy 3+6y 4 ; 4926. 6 . a8- 8a 2m-2am 2 +103736m 3 ; 1-9 . 7 . la2- lab- 1 b 2 ; - s. 8. M3+ 5m`n+mn2 ;. 9 .2a5 -a8 10 20 0 2003a 2 b 4+b 5 ; 21 . 10 . -l6ab+10mn-8mx ; -74 . 11 . a3-lla 2b+9ab 2-b 3 ; 7 . 12 . ?x 2-5 3 5 1 3 1 1 3 49 17 ~x4-_x+ 8 -9 g . 13 . 4x3+iC x2 y+ 5 xy 1+ 25 y3 ; 56 . 14 . ax--ax-1+ 8ax-8130 »EJERCICIO 27 . 1 . -ab+4b 2 . 2 . -13 . 3 . x 3-12x 2y-4xy 2-y 3 . 4 . 5m 4 -4n3 5 . 5a .6 . 2a+b-c. 7 . 0. 8 . -24x 2-5ax-3a 2 . 9 . -a 3-5a 2 +2a-3 . 10 . 12x 4 +2x 3+9x 2+6x-5 .11 . 8a 3-ab 2+b 3 +5 . 12 . n 5+lln 4-26n 3-8n 2+20n-4 . 13 . -6a4+lla 3m+3a 2m2-5am 3 -1-7m 4+6 . 14 . 7x 5+4x 4y- :38x 3y 2-1 :3x 2 y3 +48xy 4 +3y •' . 15 . b . 16 . 8x+Gy+6 . 17 . x 2-.7xy+43y 2-16 . 18 . a 2 +2b 2 . 19 . 4x 3-14x 2y+5xy 2-20y3 . 20 . 0. 21 n°-6n 5 +4rr1 +15n 3-8n-25 .22 . a5+17a4b+7a 3 b 2+7a 2 b 3 -5ab 4 -2b 5. 23 . m!-3m 3-5m 2 +6m-1- 24 . 2b"-4-25 . -6a+7b-11 . 26 . a 5-2a 4+8a 3+17a 2 -loa+1 . 27 . 5m 4 +11n1 3 11+11m 2 n 2+llmn 3-17n 4 .28 . 2a 5+7a 4b- 3a 3 b 2- 24a 2 b 3 +a b 4 -2b 5-6 . 29 . 29x 4y-47x 3y 2-2xy 4 +y 5 . 30 . 8ax+2-7ax-'-5ax+13ax -1 -ax -2 _EJERCICIO 28 . 1 . x 2+2x-3 . 2 . -3a+b+c . 3 . 6x 3+2x'=-8x+3 . 4 . -a4+a 3+a 2-a .5 . -3ab-6bc-9 . 6 . l0a 2x-14ax 2 . 7 . x 4 +6x 3 -12x 2+4x+1 . 8 . 7,z''+17rn 3n+3m 2 n 2-8rnn 3 -81rn 4 -2 . 9 . a 5 -11a 3-4a2-3a+42 . 10 . 17x 2 +14. 11 . a'2-2a+1 . 12 . -ab+5b 2 .13 . rn 1 -17rn 4 + m 3 +13m-24. 14 . -x 5+9x 4 y-1-x 3y 2+7x 2y 3+4xy 4+4y 5>+7 . 15 . as+8a 5-4a 4-2a 3+44a 2-44a . 16 . l la 4 x - a 3x'2 -10a 2 x 3+26ax 4 -5x 2 +99 .5 5 4a3- 8 2 5 7 5 2 31EJERCICIO 29. 1 . -a- -b . 2 . --a+E . 3 . -a+ -b+6 . 4 . --x3+ -x2+ -x -- .4 3 2 1 75 . -a4--a3+-a2--a--' .12 4 3 8 0 2 fi 14 0 51 13 17 1 11 1 16 . -1x+720 z-- . 7. _a 3+ ~a 2 b } 12 aó 2. 8 .2 a--c .11 1z9. 12a+ 1 . 10 . 37y 2+ 11 . - 7R3- 7 b 3- 1 .1 13 7 1 1 37 13 113 .1117- 2x- 12y-- 30z+-m-3n+- . 14 . -`a4- -a2+_a4 2.12 . - 4m3n- 00m2n-+ 4mn3- 5 n4 .EJERCICIO 30 . 1 . -x 3+x 2+3x-11 . 2 . 5a-9b+6c+8x+9 . 3 . -a 3-Sa 2 b+5ab 2 -3b 3 .4 . x 3-4x 2-x+13 . 5 . m 4-4m 2n2-3mn 3 +6n 4+8 . 6 . 4x 3+5x 2-5x-2 . 7 . De 5a 3+8ab 2-b 3 -11 . 33 . 1x-~1-4 . 9 . -5x 2+7xy+8y2+1 . 10 . 107,1 3- 8rn 2n+5mn2 -2n 3. 11 De 0 .EJERCICIO 31 . 1 . Y . 2 . 5-3x. 3 . 3a4 b-3 . 4 . 6rn+n . 5 . -2x. 6 . a. 7 . 2a2 .8 . 4. 9 . -x 2-2xy+y2 . 10 . 5-6m . 11 . x-y+2z . 12 . -2b . 13 . 2y 2+3xy-3x 2 .14 . 8x 2+4y 2. 15 . 0 .EJERCICIO 32. 1 . 2a-b . 2 . 4x . 3 . 2m+2n . 4. 6x 2+3xy-4y 2 . 5 . a+c. 6 . 2-5n .7 . y-2x . 8 . 2x 2+4xy+3y 2 . 9 . a-2b . 10. -3x+y . 11 . 3a-7b . 12 . 7m2 +2n-5 .13 . b. 14 . 5x-5y+6 . 15 . 6a+7c . 16 . -6m+2n+1 . 17 . -a-5b-6 . 18 . -4. 19 b .20 . -3a-3b . 21 . -a+b+2c . 22 . -2m+4n-7 . 23 . 2y-z . 24 . 3a+b+c.

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