Question

Решите уравнение:
(5x - 1)(х + 2) + 3(х - 4) (х + 4) = 2(2x + 3) ^2 - 8
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Answer 1

5x^2+10x-x-2+3(x^2-16)=2(4x^2+12x+9)-8;

5x^2+10x-x-2+3x^2-48=8x^2+24+18-8;

8x^2+9x-50=8x^2+24x+10;

9x-50=24x+10;

9x-50-24x-10=0;

-15x-60=0;

x+4=0;

x=-4.