Question

2x^2 +bx−10=0, if one of its roots is 5

find x and b

Answer 1

Step-by-step explanation:

if one of the roots is 5 then replace x with 5

2×5^2 + 5b - 10 = 0

50 + 5b -10 = 0

40 + 5b = 0

5b = -40

b = -8