Question

(x+2)(x elevado a 3+5x-10)-(2x elevado a 3+4x elevado a 2-8x)= ?
Obs: responda com conta

Answer 1

= (x + 2).(x³ + 5x - 10) - (2x³ + 4x² - 8x)

= x.x³ + x.5x + x.(-10) + 2x³ + 2.5x + 2.(-10) - 2x³ - 4x² + 8x

= x⁴ + 5x² - 10x + 2x³ + 10x - 20 - 2x³ - 4x² + 8x

= x⁴ + 5x² - 4x² + 8x - 20

= x⁴ + x² + 8x - 20

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