Verified answer

Resposta:=4

Explicação passo a passo:

se não for 4 e igual 24 ou 23  ok

Resposta:

[tex] \red{8x {}^{2} + 2x - 15} \\ [/tex]

Explicação passo-a-passo:

[tex] \blue{(2x + 3) \times (4x - 5)} \\ (2x + 3) \times (4x - 5) \\ 2x \times 4x - 2x \times 5 +3 \times 4x - 3 \times 5 \\ 2x \times 4x \\ 8x \times x \\ 2x \times 4x \\ 8x {}^{2} \\2x \times 4x - 2x \times 5 + 3 \times 4x - 3 \times 5 \\8x {}^{2} - 2x \times 5 + 3 \times 4x - 3 \times 5\\2x \times 4x - 2x \times 5 + 3 \times 4x - 3 \times 5 \\ - 2x \times 5 \\ - (2 \times 5)x \\ - 10x \\2x \times 4 - 2x \times 5 + 3 \times 4x - 3 \times 5 \\8x {}^{2} - 10x + 3 \times 4x - 3 \times 5 \\2x \times 4 - 2x \times 5 + 3 \times 4x - 3 \times 5 \\3 \times 4x \\ 12x \\ 2x \times 4x - 2x \times 5 +3 \times 4x - 3 \times 5 \\ 8x {}^{2} - 10x + 12x - 3 \times 5 \\ 2x \times 4x - 2x \times 5 + 3 \times 4x - 3 \times 5 \\ - 3 \times 5 \\ - (3 \times 5) \\ - 15 \\ 2x \times 4x - 2x \times 5 + 3 \times 4x - 3 \times 5 \\ 8x {}^{2} - 10x + 12x - 15 \\ - 10x + 12x \\ ( - 10 + 12)x \\ 2x \\ 8x {}^{2} - 10x + 12x - 15 \\ 8x {}^{2} + 2x - 15 \\ \purple{resposta} \\ \red{8x {}^{2} + 2x - 15} [/tex]