Question

URGENTE (PARA ENTREGAR AMANHÃ)
1- Resolva as expressões:

A- 3.( x + 4)

B- (a - 42)² + 12x

C-( 3x - 4 )² + ( 3x + 4 ) . (3x- 4)

D- (2a - 3b)²

E- ( -a + 3b)²

F- a.a.a.a
_____
a.a

Answer 1

$a)3 \times (x + 4) \\ 3x + 3 \times 4 \\ 3x + 12 \\ \\ \\ b)(a - 42) {}^{2} + 12x \\ a {}^{2} - 2a \times 42 + 42 {}^{2} + 12x \\ a {}^{2} - 84a + 1764 + 12x \\ \\ \\ c)(3x - 4) {}^{2} + (3 \times + 4) \times (3 \times - 4) \\ (3x - 4) \times (3x - 4 + 3x + 4) \\ (3x - 4) \times (3 \times + 3x) \\ (3x - 4) \times 6x \\ 6x \times (3 \times - 4) \\ \\ \\ d)(2a - 3b) {}^{2} \\ (2a) {}^{2} - 2 \times 2a \times 3b + (3b) {}^{2} \\ 4a {}^{2} - 12ab + (3b) {}^{2} \\ \\ \\ e)( - a + 3b) {}^{2} \\ (3a - a) {}^{2} \\ 9b {}^{2} - 6ab + a {}^{2} \\ \\ \\ f) \frac{a \times a \times a \times a \times }{a \times a} = \frac{a {}^{4} }{a {}^{2} } = a {}^{2}$

Answer 2

a)3x+12      

b)a(ao quadrado) -84+12x

c)-22x(ao quadrado) - 16

d)2a(ao quadrado) - 6b(ao quadrado)

e)-a(ao quadrado)+3b(ao quadrado)

f)4a

2a