Question

a) 2x²+x-3=0 b) -3 x² +18 -15 =0​

Answer 1

a)2x^2+3x-2x-3 = 0

x×(2x+3)-(2x-3) = 0

(2x+3)×(x-1) = 0

2x+3 = 0

x-1 = 0

x' = -3/2

x'' = 1

b) -3x^2+18-15 = 0

-3x^2+3 = 0

x^2-1 = 0

x+1 = 1

x-1 = -1

x' = 1

x'' = -1