Question

Qual a área do retângulo que tem comprimento (x + 1) e largura (2x - 1)? * a) 4x² - 1 b) 4x – 1 c) 2x² + x - 1 d) x² + x -1

Answer 1

$\mathsf{(x+1)(2x-1)=2x^2-x+2x-1}\\\mathsf{=2x^2+x-1}$

$\huge\boxed{\boxed{\boxed{\boxed{\mathsf{\maltese~~alternativa~~c}}}}}$

Answer 2

Oie, Td Bom?!

>>> Resposta: Opção C.

$(x + 1) \: . \: (2x - 1)$

$x \: . \: (2x - 1) + 1(2x - 1)$

$2x {}^{2} - x + 2x - 1$

$2x {}^{2} + x - 1$

Att. Makaveli1996