Question

me ajudem por favor!!!!!!!


A) 5.(a+b)=
B) -7.(3x-4)=
C) 9.(x²+4x-6)=
D) 5x.(x²-9)=
E) 8x.²(3x²+8x-9)=
F) 7H³.(-H+11H⁴)=


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Answer 1

Explicação passo-a-passo:

a) $\sf 5\cdot(a+b)=5a+5b$

b) $\sf -7\cdot(3x-4)=-21x+28$

c) $\sf 9\cdot(x^2+4x-6)=9x^2+36x-54$

d) $\sf 5x\cdot(x^2-9)=5x^3-45x$

e) $\sf 8x^2\cdot(3x^2+8x-9)=24x^4+64x^3-72x^2$

f) $\sf 7H^3\cdot(-H+11H^4)=-7H^4+77H^7$

Answer 2

Oie, Td Bom?!

A)

$5(a + b) = 5a + 5b$

B)

$- 7(3x - 4) = - 7 \: . \: 3x - 7 \: . \: ( - 4) = - 21x + 28$

C)

$9(x {}^{2} + 4x - 6) = 9x {}^{2} + 9 \: . \: 4x - 9 \: . \: 6 = 9x {}^{2} + 36x - 54$

D)

$5x \: . \: (x {}^{2} - 9) = 5x \: . \: x {}^{2} - 5x \: . \: 9 = 5x {}^{3} - 45x$

E)

$8x {}^{2} \: . \: (3x {}^{2} + 8x - 9) = 8x {}^{2} \: . \: 3x {}^{2} + 8x {}^{2} \: . \: 8x - 8x {}^{2} \: . \: 9 = 24x {}^{4} + 64x {}^{3} - 72x {}^{2}$

F)

$7h {}^{3} \: . \: ( - h + 11h {}^{4} ) = - 7h {}^{3} \: . \: h + 7h {}^{3} \: . \: 11h {}^{4} = - 7h {}^{4} + 77h {}^{7}$

Att. Makaveli1996