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Natasha Kelley
Mathematics
25 July, 21:05
Find either of the values of x
2x^2+3x-2=3
+5
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1
)
Joselyn Hickman
25 July, 21:33
0
x = 1 or x = - 5/2
Step-by-step explanation:
Solve for x over the real numbers:
2 x^2 + 3 x - 2 = 3
Divide both sides by 2:
x^2 + (3 x) / 2 - 1 = 3/2
Add 1 to both sides:
x^2 + (3 x) / 2 = 5/2
Add 9/16 to both sides:
x^2 + (3 x) / 2 + 9/16 = 49/16
Write the left hand side as a square:
(x + 3/4) ^2 = 49/16
Take the square root of both sides:
x + 3/4 = 7/4 or x + 3/4 = - 7/4
Subtract 3/4 from both sides:
x = 1 or x + 3/4 = - 7/4
Subtract 3/4 from both sides:
Answer: x = 1 or x = - 5/2
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