Question

Please answer this question:solve 2x^2+x-15≤0.

Answer 1

$2x {}^{2} + x - 15 \leqslant 0$

$2x {}^{2} + 6x - 5x - 15 \leqslant 0$

$2x(x + 3) - 5(x + 3) \leqslant 0$

$(2x - 5)(x + 3) \leqslant 0$

$x \leqslant - 3 \: \: \: and \: \: \: x \leqslant 5 \div 2$


x belongs to [-3, 5/2]



Thanks