2x^2+7x+8=0 complete the square
Answers
Answered by
0
Answer:
2
x
2
−
7
x
−
8
=
0
Use the quadratic formula to find the solutions.
−
b
±
√
b
2
−
4
(
a
c
)
2
a
Substitute the values
a
=
2
,
b
=
−
7
, and
c
=
−
8
into the quadratic formula and solve for
x
.
7
±
√
(
−
7
)
2
−
4
⋅
(
2
⋅
−
8
)
2
⋅
2
Simplify.
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x
=
7
±
√
113
4
The result can be shown in multiple forms.
Exact Form:
x
=
7
±
√
113
4
Decimal Form:
x
=
4.40753645
…
,
−
0.90753645
…
Step-by-step explanation:
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Answered by
0
Answer:
2x^2+7x+8=0
=2x^2+7x=-8
=x(2x+7) = -8
0
=x(2x+7) +8= -------
x
=2x+15=0
=2x= -15
=x= 7.5
ans =7.5
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