Question
Exercicel! \( (-2 x+3)(5-8 x)-2 x(2+1) \)
Ask by French Todd. in Senegal
Jan 23,2025
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Answer
\( 16x^{2} - 40x + 15 \)
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Let's tackle that expression! First, we need to expand it. Start with \( (-2x + 3)(5 - 8x) \). Distributing, we get: \[ -2x \cdot 5 + (-2x)(-8x) + 3 \cdot 5 + 3 \cdot (-8x) = -10x + 16x^2 + 15 - 24x = 16x^2 - 19x + 15. \] Now, deal with the second part, \( -2x(2 + 1) \): \[ -2x \cdot 3 = -6x. \] Combining both parts, we have: \[ 16x^2 - 19x + 15 - 6x = 16x^2 - 25x + 15. \] So the final expression simplifies to: \[ 16x^2 - 25x + 15. \]