Question

for what value of m, can the equation -9x^2 + 12x - m =0 be a perfect square of a linear expression?

a. 4

b. 8

c. 9

d. 12​

Answer 1

-9x²+12x-m=0

9x²-12x+m=0

if m=4

9x²-12x+4=0

(3x-2)²=0