X2-3x-10=0 solve quadratic equation by using formula
Answers
Answered by
21
Answer:
x2 -3x -10 =0
Step-by-step explanation:
factors of 10 are -5+2.
x2+2x-5x-10=0
x(x+2) -5 (x+2)
(x-5). (x+2) =0
x=5 x=-2
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Answered by
13
Answer:
x=5,x=-2
Step-by-step explanation:
x²-3x-10=0
x = -b ± √b² -4×a×c/ 2×a
a=1. b=-3. c=-10
x = -(-3) ± √-3² -4×1×-10/2×1
x= 3 ± √9+40 /2
x=3± √49/2
x=3± 7/2
x=3+7/2. or. x=3-7/2
x=10/2. or. x=-4/2
x=5. or x=-2
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