option (a)
step-by-step explanation:
step 1: take 2 number whose product equal to 25..
and sum of those two number are -10
step: 2 for example here if we take 5,5 are the number,,
5*5=25
and
5+5=10
but we need -10
so if we take -5,-5
so -5*-5=25
and -5+(-5)=-10
s0
come the equation
replace -10x by these number
like -5x -5x+25
take common
x(x-5)-5(x-5)=0
(x-5)(x-5)=0