Question

If x=1 is a common root of the equation ax2 + ax + 3 = 0 & X2 + x + b = 0 , then the value of ab is
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Answer 1

Answer:

3

Step-by-step explanation:

if x=1

therefore,

ax²+ax+3=0

a(1)²+a(1)+3=0

a+a+3=0

2a+3=0

• a=-3/2

also,

x²+x+b=0

(1)²+1+b=0

1+1+b=0

2+b=0

• b=-2

so,

ab=-3/2*-2

=-3*-1

=3