Question

factorise 2x²+5x -10

Answer 1

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Answer 2

This question is in the form of a$x^{2}$ + b$x$ + $c$, where a=2, b=5, and c=-10.

There are two possible values:

The formula to be used is $x=(-b + \sqrt{b^{2}-4ac })/2a$ and $x=(-b - \sqrt{b^{2}-4ac })/2a$.

Substituting the values, you get $x=5.246/4$ or $x=-15.246/4$,
or $x=1.3115 or x=-3.8115$