Question

a) (x + 2)(x +3)
b) (a - 2)(a - 7)
c) (y + 6)(y - 6) 


me ajudemm plsss


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Answer 1

$a)\\\left(x+2\right)\left(x+3\right)\\\\=xx+x\cdot \:3+2x+2\cdot \:3\\\\=xx+3x+2x+2\cdot \:3\\\\=x^2+5x+6$

$b)\\\left(a-2\right)\left(a-7\right)\\\\=aa+a\left(-7\right)+\left(-2\right)a+\left(-2\right)\left(-7\right)\\\\=aa-7a-2a+2\cdot \:7\\\\=a^2-9a+14$

$c)\\\left(y+6\right)\left(y-6\right)\\\\=y^2-6^2\\\\6^2=36\\\\=y^2-36$

Answer 2

Explicação passo-a-passo:

A) x²+ 3x + 2x + 6 = x² + 5x + 6

B) a² - 7a - 2a + 14 = a² - 9a + 14

C) y² - 6y - 6y - 36 = y² - 12y - 36