Question

simplifique as expressões
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Answer 1

Resposta:

A) a(5a-1)+(a+2)²

5a²-a +(a+2)²

5a²-a + a²+4a+4

6a²-a+4a+4

R= 6a²+3a+4

B)(2x + 3)²-x(x-4)

4x²+12x+9-x(x-4)

4x²+12x+9-x²+4x

3x²+12x+9+4x

R= 3x²+16x+9

C)(y-3)(y+2)-(y+1)²

y²+2y-3y-6-(y+1)²

y²+2y-3y-6-(y²+2y+1)

y²+2y-3y-6-y²-2y-1

2y-3y-6-2y-1

-3y-6-1

R=-3y-7

D)(9y+1)²-(y+9)²

81y²+18y+1-(y+9)²

81y²+ 18y+1-y²-18y-81

81y²+1-y²-81

80y²+1-81

R=80y²-80