Question

1. Desenvolva os produtos notáveis e reduza os termos semelhantes.

a) (x + 7)(x – 7) – x

2 + 50 = g) (3x + 1)(3x – 1) – 8x2 + 1 =

b) (2a – 3b)(2a + 3b) + 9b2 + 1 = h) (5x – 2)2 + (x – 3)(x – 2) =

c) (x – 5)2

– (x – 3)2

– 16 = i) (2x + 1)2

– 3x2 + 8 =

d) (x + 2)2

– (x + 4)2 + 4x + 12 = j) (x + 1)(x – 3) + 2(x + 1) =

e) (m + n)2

– (2m + n)2

= k) 6(a + 2)2 + 2(a – 3)2 + (a – 4)(a + 4) =

f) (2m2

– 3) – 2(m2 + 1)(m2

– 1) = l) (x – 1)2

– (2x – 1)2 + (3x – 1)2​

Answer 1

Resposta:

a) x² - x + 3 = 0

Explicação passo-a-passo:

a) x² - 49 -x +2 +50 = x² -x +3 =