Question

solve the following quadratic equation by factorisation 25 x bracket X + 1 is equal to -4​

Answer 1

Solution:

25x(x+1)=-4

=> 25x²+25x+4=0

Splitting the middle term,we get

=> 25x²+20x+5x+4=0

=> 5x(5x+4)+1(5x+4)=0

=> (5x+4)(5x+1)=0

=> 5x+4=0 or 5x+1 = 0

=> 5x=-4 or 5x=-1

=> x = -4/5 or x = -1/5

Therefore,

-4/5 , -1/5 are roots of given

quadratic equation.

•••

Answer 2

25x(x+1)=-4

Step-by-step explanation:

25x^+25x+4=0

25x^+20x+5x+4=0

5x(5x+4)+1(5x+4)=0

(5x+4)(5x+1)=0

5x+4=0 or 5x+1=0

5x=-4 or 5x=-1

x=-4/5 or x=-1/5