Question

for what value of m the quadratic equation X square - 4 x + m is equal to zero will have a real and equal roots

Answer 1

Hey

Here is your answer,

X^2 - 4x + m = 0

a = 1
b = -4
c = m

b^2 - 4ac = 0
(-4)^2 - 4 x 1 x m = 0
16 - 4m = 0
-4m = -16
m = -16/-4
m = 4

Hope it helps you!

Answer 2

For real and equal roots, D (discriminant) = 0
we know that D = b^2 - 4ac..
Later steps are in the attached picture