Question

(4x+10)(5x-10)

Find the value of x = (4x+10)(5x-10)​

Answer 1

Answer:

x = -2 or -5/2

put it in the eqn. which is suitable means that is the answer..

• when x = -2

(4x+10) (5x-10)=0

(4×-2+10) (5×-2-10)=0

(-8+10) (-10+10) =0

2×0 = 0

0=0

• when X = 5/2

(4x+10) (5x-10) =0

(4×5/2+10) (5×5/2-10)=0

(10+10) (12.5-10)=0

20×2.5=0

2.5 is not equal to 0

It means that :

x= -2 ANS...

HOPE IT WILL HELP:-)))