if 2 is the common root of ax^2+ax+2=0 and x²+x+b=0 then, find the value
of ab.
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Answered by
0
Answer:
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Answered by
1
Answer:
ax
2
+ax+3=0
x=1 is a root of the equation
a+a+3=0
2a=−3
a=
2
−3
x
2
+x+b=0
x=1 is root
1+1+b=0
b=−2
∴ab=
2
−3
×−2
ab=3
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