Answer:
the vertex form :
4(x − (-2))² - 64
Step-by-step explanation:
4x²+16x-48
= 4(x² + 4x) - 48
= 4(x² + 4x + 4 - 4) - 48
= 4(x² + 4x + 4) - 4×4 - 48
= 4(x + 2)² - 16 - 48
= 4(x + 2)² - (16 + 48)
= 4(x + 2)² - 64
= 4(x − (-2))² - 64
