3 years ago

Help with the following photo

Mathematics

2 answers:

daser333 [38]3 years ago

4 0

Answer:

optionA.8^12.

Step-by-step explanation:

hope it helps you.

Sladkaya [172]3 years ago

3 0

Answer:

First answer

Step-by-step explanation:

The power of a power are multipled together

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makkiz [27]

Answer: a) $x=\dfrac{-9 \pm\sqrt{113} }{8}$

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Step-by-step explanation:

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$x=\dfrac{-b \pm \sqrt{b^{2}-4ac } }{2a} \\\\a=4; \: \: b=9; \: \: c=-2\\x =\dfrac{-9 \pm \sqrt{9^{2}-4 \cdot 4 \cdot (-2) } }{2 \cdot 4} =\dfrac{-9 \pm\sqrt{113} }{8}$

b) x² + 8x - 84 = 0

$x=\dfrac{-b \pm \sqrt{b^{2}-4ac } }{2a} \\\\a=1; \: \: b=8; \: \: c=-84\\\\x =\dfrac{-8 \pm \sqrt{8^{2}-4 \cdot 1 \cdot (-84) } }{2 \cdot 1} =\dfrac{-8 \pm\sqrt{400} }{2}=\dfrac{-8 \pm 20}{2} =-4 \pm 10\\\\x_{1} =-14\\x_{2} =6$

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3 years ago