5 x square + 13 x + 8 = 0 by quadratic formula
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Answered by
3
Step-by-step explanation:
5x^2 + 13x - 8 = 0
a = 5; b = 13; c = -8
x = (-b +/-sqrt(b^2 - 4ac))/2a
x = (-13 +/-sqrt(13^2 - 4(5)(-8))/2(5)
x = (-13 +/-sqrt(169 + 160))/10
x = (-13 + sqrt(329))/10 = 0.5138357147
x = (-13 - sqrt(329))/10 = -3.113835715
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Answered by
1
Answer:
5xsquare+13x+8=0 comparing with
a x square+bx+c =0
we get a=5 ,b=13 , c=8
b square-4ac= (13)square - 4×5×8
= 169 - 160
= 9
x = -b+/- √b square-4ac÷2a
= -13 +/- √9 ÷ 2×5
= -13 +/- 3 ÷ 10
x= -13+3 ÷10. or. x = -13-3 ÷ 10
= -10÷10. = -16 ÷ 10
= -1. = -8/5
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