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san4es73 [151]
3 years ago
10

Solve the equation for x, where x is a real number (5 points): 2x^2 + 9x - 1 = 3

Mathematics
1 answer:
NISA [10]3 years ago
5 0
Subtract 3 from both sides so that the equation becomes 2x^2 + 9x - 4 = 0.
To find the solutions to this equation, we can apply the quadratic formula. This quadratic formula solves equations of the form ax^2 + bx + c = 0
                                 x = [ -b ± √(b^2 - 4ac) ] / (2a)
                                 x = [ -9 ± √(9^2 - 4(2)(-4)) ] / ( 2(2) )
                                 x = [ -9 ± √(81 - (-32) ) ] / ( 4 )
                                 x = [ -9 ± √(113) ] / ( 4)
                                 x = [ -9 ± sqrt(113) ] / ( 4 )
                                 x = -9/4 ± sqrt(113)/4
The answers are -9/4 + sqrt(113)/4 and -9/4 - sqrt(113)/4.
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4 years ago
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Keith_Richards [23]

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therefore we have

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3 years ago
Jade wants to verify that the expression 5(3x-6) is equivalent to 15x - 30. She substitutes 2 into each expression and
rjkz [21]

5(3x-6) is equivalent to 15x - 30 if they are equivalent if the two values are the same.

<h3>What is expression?</h3>

An expression is a set of terms combined using the operations +, – , x or , /.

Given expression:

5(3x-6) is equivalent to 15x - 30.

If we put x=2 in both expression, we get finite value.

To check both the expression are equal or not we have to solve by putting the value.

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They are equivalent if the two values are the same otherwise not.

Learn more about expression here:

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