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2 years ago

8

Find the value of x to 2dp in the equation 2x² + 5x = 9

1 answer:

ICE Princess25 [194]2 years ago

7 0

Answer:

where x1=-3.71 and x2=1.21

Step-by-step explanation:

<u>first</u><u>=</u><em> </em><em>2</em><em>x</em><em>+</em><em>5</em><em>x</em><em>-</em><em>9</em><em>=</em><em>0</em><em>,</em><em> </em><em> </em><em>a</em><em>=</em><em>2</em><em>,</em><em>b</em><em>=</em><em>5</em><em>,</em><em>c</em><em>=</em><em>-</em><em>9</em><em>,</em><em> </em><em> </em><em>x</em><em>=</em>

<em> $\sqrt{ {5 }^{2} } - 4 \times 2( - 9) \: over4$ </em>

<em>second</em><em> </em><em>x</em><em>=</em>

<em> $\sqrt[ - 5 + ]{25 + 72} over4$ </em>

<em>x</em><em>=</em>

<em> $\sqrt[ - 5 +4 ]{97}$ </em>

<em> $\sqrt[ - 5 - 4]{97}$ </em>

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Step-by-step explanation:

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