Question

ajuda aí por favor gente​

Answer 1

Resposta:

a) (a-1)·(a+3)

=$aa+a\cdot \:3+\left(-1\right)a+\left(-1\right)\cdot \:3$

=$aa+3a-1\cdot \:a-1\cdot \:3$

=$a^2+2a-3$

b) (b+2)·(b-3)

=$bb+b\left(-3\right)+2b+2\left(-3\right)$

= $bb-3b+2b-2\cdot \:3$

= $b^2-b-6$

c) (c+2)·(c-3

= $cc+c\left(-3\right)+2c+2\left(-3\right)$

= $cc-3c+2c-2\cdot \:3$

= $c^2-c-6$

d) (3d-2)·(2d-3)

= $cc+c\left(-3\right)+2c+2\left(-3\right)$

= $cc-3c+2c-2\cdot \:3$

= $c^2-c-6$

e)  (e-1)²

=$e^2-2e1+1^2$

= $e^2-2e+1$  

f) (f+6)·(f-1)

=$ff+f\left(-1\right)+6f+6\left(-1\right)$

=$ff-1\cdot \:f+6f-6\cdot \:1$

= $f^2+5f-6$

g) (g-1)·(g²-4g+2)

= $gg^2+g\left(-4g\right)+g\cdot \:2+\left(-1\right)g^2+\left(-1\right)\left(-4g\right)+\left(-1\right)\cdot \:2$

= $g^2g-4gg+2g-1\cdot \:g^2+1\cdot \:4g-1\cdot \:2$

$g^3-5g^2+6g-2$

Desculpa e facil mais....  demora  passar para o brainly  do caderno es demorado..

Espero ter ajudado bons estudos