If the roots of the equation mx? - 3mx +9=0 are real and equal, find the
value of m.
answer should come m=4
I want step
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If the roots of the equation mx? - 3mx +9=0 are real and equal, find the
value of m.
answer should come m=4
I want step
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Step-by-step explanation:
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answer
given,
mx²-3mx+9 = 0
roots are real and equal.
to find,
value of m
let's understand:-
to find the value of m given condition is that roots are real and equal
.: ∆ = b²-4ac = 0.
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solution
by comparing with ax²+bx+c
we can say that:
a = m
b= -3m
c = 9
.: b²-4ac = 0
(-3m)² - 4(m)(9) = 0
9m² - 36m = 0
9m ( m-4) = 0
.: 9m = 0. m - 4 = 0
m = 0. m = 4
.: m can't be zero so m = 4
Answer:
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