Question

Factor x2 + x – 42.

Answer 1

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$\blue\textsf{\textbf{\underline{\underline{Question:-}}}}$

Factor x²+x-42

$\blue\textsf{\textbf{\underline{\underline{Answer and How to Solve:-}}}}$

First, think of two numbers such that

• If we multiply them we'll get -42
• If we add them we'll get 1

These numbers are:-

7 and -6

Write them here:-

(x+7)(x-6)

Note:-

We don't have to use the Big X method, since the coefficient of x² is 1.

If it's greater than 1, like 2, then the Big X method comes in handy.

Good luck.

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