Question

Write the value of 7. for which x2 + 4x + 1. is a perfect square​

Answer 1

Since f(x) is perfect square, then both the roots are equal.

Since f(x) is perfect square, then both the roots are equal.∴ D=0

Since f(x) is perfect square, then both the roots are equal.∴ D=016−4a=0

Since f(x) is perfect square, then both the roots are equal.∴ D=016−4a=0a=4