Find the roots of quadratic equation x² + 8x + 15.
a) 3,5
b) -3, 5
c) -3, -5
d) 3,-5
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Find the roots of quadratic equation x² + 8x + 15.
a) 3,5
b) -3, 5
c) -3, -5
d) 3,-5
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Step-by-step explanation:
hope it will help you
Given :-
To Find :-
Solution :-
~By Factorization [ middle term splitting ].
➟ x² + 8x + 5
➟ x² + 5x + 3x + 15 = 0
~By taking x and 3 common.
➟ x( x + 5 ) + 3( x + 5 ) = 0
➟ (x + 3)(x + 5) = 0
~Either of them will be zero.
➟ x + 3 = 0
➟ x = 0 - 3
➟ x = - 3
➟ x + 5 = 0
➟ x = 0 - 5
➟ x = - 5
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