Question

Convert y=X2 + 4x + 3 from standard form to vertex form

Answer 1

Hello :
x²+4x+3 = x²+2(2x)+4-4+3
= (x²+2(2x)+2²) -1
x²+4x+3 = (x+2)² -1 ....(vertex form ) the vertex is : A( -2 ; -1)