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storchak [24]
2 years ago
8

What does x equal in this equation? 2x^{2} -7x+9=0

Mathematics
1 answer:
snow_tiger [21]2 years ago
6 0

Answer:

Step-by-step explanation:                                    -b ± √(b² - 4ac)

Let's solve for x using the quadratic formula x = ------------------------

                                                                                          2a

In this case the coefficients are 2, -7 and 9, so the discriminant, b^2 - 4ac, is (-7)^2 - 4(2)(9), or 49 - 72 = -23.

The roots (zeros) of this quadratic are thus:

       -(-7) ± i√23

x = ----------------------

                 4

or

        7 ±i√23

x = -------------------

               4

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Answer:

\boxed{\bold{2a^2+9ab-7b^2}}

Step By Step Explanation:

Remove Parenthesis: (a) = a

\bold{5a^2+4ab-3b^2-\left(-5ab+4b^2+3a^2\right)}

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Rewrite Equation:

\bold{5a^2+4ab-3b^2+5ab-4b^2-3a^2}

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