Question

If x² + 4x +a = (x + 2) ², find the value of a.​

Answer 1

Answer:

a= 4

explanation:

$x ^{2} + 4x + a = x ^{2} + 4x + 4$

because (a+b) ^2= a^2 +2ab +b^2

so,

$x ^{2} - x ^{2} + a = 4x - 4x + 4$

therefore, a= 4