Question

Qual o valor de (+5×) . (+4×) ?

Answer 1

Resposta:

20x^2

$( + 5x).( + 4x) = \\ ( + 5x) \times ( + 4x) \\ 5x \times (4x) \\ ( + 5x) \times ( + 4x) \\ 5x \times4x \\ 20 \times x \times \\ 5x \times 4x \\ 20x {}^{2} \\ 5x \times 4x \\ 20x {}^{2} \\ resposta \\ 20x {}^{2}$