Question

what are the factors of the expression 7x²+18x+8?

1️⃣ (7x+4) (x+2)
2️⃣ (7x+4) (x-2)
3️⃣ (7x-4) (x+2)
4️⃣ (7x-4) (x-2)​

Answer 1

Resposta:

(7x+4) (x+2)

Explicação passo-a-passo:

(7x+4) (x+2) =

7x × x + 7x × 2 + 4 × x + 4 × 2 =

7x² + 14x + 4x + 8 =

7x² + 18x + 8

Answer 2

Vamos là.

7x² + 18x + 8

7x² + 14x + 4x + 8

7x*(x + 2) + 4*(x + 2)

(x + 2)*(7x + 4) (+1)