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Fury
Mathematics
27 January, 17:07
Solve for x
X^2+6x+9=20
+5
Answers (
2
)
Kristen Tapia
27 January, 17:11
0
x=1.472 or x=-7.472
Step-by-step explanation:
Lets begin by rearranging the equation into the format ax²+bx+c=0
The equation will be:
x²+6x+9-20=0
x²+6x-11=0
We shall use the quadratic formula to solve the equation.
x=[-b±√ (b²-4ac) ]/2a
=[-6±√ (6²-4*1*-11) ]/2
=[-6±√80]/2
=[-6±8.944]2
x = Either (-6+8.944) / 2 or x = (-6-8.944) / 2
Solving for x in each case gives:
x=1.472 or x=-7.472
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Madisyn Grimes
27 January, 17:22
0
x = 1.47 or x = - 7.47
Step-by-step explanation:
x²+6x+9=20
This is a quadratic equation
x²+6x+9-20=0
x²+6x-11=0
Step 1 : Write the quadratic formula
x = - b±√b²-4 (a) (c)
2a
Step 2 : Substitute values in the formula
a = 1
b = 6
c = - 11
x = - 6±√6²-4 (1) (-11)
2 (1)
x = - 6±√80
2
x = - 3 + 2√5 or x = - 3 - 2√5
x = 1.47 or x = - 7.47
!
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