Question

What number should be added to polynomial x2 + 2x – 35, so that the 3 is the zero
of polynomial

Answer 1

Step-by-step explanation:

Ans: 20

=x^2+2x-35+20

=x^2+2x-15

Now substitute X=3 in the equation

=3^2+2(3)-15

=9+6-15

=15-15

=0

I hope this answer is helpful to you.

Answer 2

Answer:

x2-2x-35=0

x2-7x+5x-35=0

x(x-7)+5(x-7)=0

(x-7)(x+5)=0

x-7=0 or x+5=0

x=7 or x=-5

Check: x=7 ,LHS = 49-14-35

=0 =RHS

x=-5, LHS = 25+10-35

=0=RHS

Ans: x=7 or x=-5