Question

solve this quadratic equation by factorisation 4x²+5x=0​

Answer 1

Answer:

or

x = 5 /4

Step-by-step explanation:

The quadratic formula for ax2+bx+c=0 is given by x = − b ± √ b 2 − 4 a c /2 a

a = 4,  b = − 5 ,  c = 0

∴ x = − ( − 5 ) ± √ ( − 5 ) 2 − 4 ( 4 ) ( 0 ) /2 ( 4 )

x = 5 ± √ 25 /8

x = 5 ±  5 /8  

x = 0

or

x = 10 /8

= 5 /4