Question

(x+9)²
(3-a²)²
(X+11).(x-11)
(4x-1)²

Answer 1

Resposta:

$a)\left(x+9\right)^2:\quad x^2+18x+81\\b)\left(3-a^2\right)^2:\quad 9-6a^2+a^4\\c)\left(x+11\right)\cdot \left(x-11\right):\quad x^2-121\\d)\left(4x-1\right)^2:\quad 16x^2-8x+1$

Answer 2

Explicação passo-a-passo:

$a)(x + 9) {}^{2} = x {}^{2} + 2.1.9.x + 9 {}^{2} = x {}^{2} + 18x + 81$

$b)(3 - a {}^{2} ) {}^{2} = 3 {}^{2} - 2.3.a {}^{2} + (a {}^{2} ) {}^{2} = 9 - 6a {}^{2} + a {}^{4}$

$c)(x + 11).(x - 11) = x {}^{2} - 121$

$d)(4x - 1) {}^{2} =(4x) {}^{2} - 2.4.x + 1 {}^{2} = 16x {}^{2} - 8x + 1$