Factor and check: x^2 + 3x - 10 = 0

x^2 + 3x - 10 = 0

(x )(x ) ( -2)( +5)=0

(x-2) (x+5) = 0

Check:

(x-2) (x+5) = 0

(x)(x) (x)(5) (-2)(x) (-2)(5)=0

x^2 +5x -2x -10=0

x^2 +3x -10=0