How many real roots are in y=2x^2-7x-15?

1 Answer

The real roots in y=2x27x15 are x=32 and x=5.

Explanation:

y=2x27x15

y=0

2x27x15=0

Attempting to factorise

2x2+3x10x15=0

x(2x+3)5(2x+3)=0

(x5)(2x+3)=0

x5=0

x=5

2x+3=0

2x=3

x=32

The real roots in y=2x27x15 are x=32 and x=5.