Question

Factor x2 + 3x − 10.

(x + 5)(x + 2)

(x − 5)(x − 2)

(x + 5)(x − 2)

(x − 5)(x + 2)

Answer 1

`(x-2)(x+5)`

Explanation:

two numbers that multiply to give -10 and add to give 3.

5 and -2

`x^(2) -2x+5x-10` - Break the 3x into the 2 multiples you get

`x(x-2) +5(x-2)` - Factorise the first 2 numbers and the last two numbers

`(x-2)(x+5)` - Put the common brackets into 1 and the outside digits into another bracket.