Question

Factorise the following= 3x^2 + 15x - 2400

Answer 1

Answer:

Step-by-step explanation:

3x²+ 15x- 2400= 0

3 (x²+ 5x- 800)= 0

x²+ 5x- 800= 0

x= {-5 ±√[25+ (4× 800)]} /2

x= [-5 ±(√3225)] /2

x= 5/2 (-1 ± √129)

Pls mark me as brainliest ..