Question

Решите неравенство 2×(х-5)(х+1)≥0

Answer 1

(2x-10)(x+1)>=0
2x^2+1-10x-10>=0
2x^2-10x-9>=0

Answer 2

2(х-5)(х+1)≥0
2(x²+x-5x-5)≥0
2(x²-4x-5)≥0
2x²-8x-10≥0
2x²-8x =10≥0