value of 7x^2+2x-3 at x = 2
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Answer:
x
2
−
2
x
+
3
=
0
Use the quadratic formula to find the solutions.
−
b
±
√
b
2
−
4
(
a
c
)
2
a
Substitute the values
a
=
7
,
b
=
−
2
, and
c
=
3
into the quadratic formula and solve for
x
.
2
±
√
(
−
2
)
2
−
4
⋅
(
7
⋅
3
)
2
⋅
7
Simplify.
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