Question

(2x-3)(x+5)-(3-x)(5-2x)-20

Answer 1

Объяснение:

$(2x - 3)(x + 5) - (3 - x)(5 - 2x) - 20 \\ \\ 2x {}^{2} + 10x - 3x - 15 - (15 - 6x - 5x + 2x {}^{2} ) - 20 \\ \\ 2x {}^{2} + 10x - 3x - 15 - 15 + 11x - 2x {}^{2} - 20 \\ \\ 18x - 50$

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