3 years ago

NEED HELP PLEASE ASAP !

Mathematics

1 answer:

Cloud [144]3 years ago

4 0

Answer:

7 ⁻²²

Step-by-step explanation:

7¹⁶/7¹² = 7⁻¹⁸/7ˣ

7⁽¹⁶⁻¹²⁾ = 7⁽⁻¹⁸⁻ˣ⁾

16 - 12 = - 18 - x

4 = - 18 - x

x = - 18 - 4

x = - 22

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eimsori [14]

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2 years ago

98-x2=0 solve this with the quadratic formula

Mars2501 [29]

Answer:

x∈{-7√2, 7√2}

Step-by-step explanation:

$98-x^2=0\\\\-x^2+98=0\\\\a=-1\,,\ \ b=0\,,\ \ c=98\\\\x_1=\dfrac{-0-\sqrt{0^2-4\cdot(-1)\cdot98}}{2\cdot(-1)}=\dfrac{-\sqrt{4\cdot49\cdot2}}{-2}=\dfrac{-2\cdot7\sqrt{2}}{-2}=7\sqrt2\\\\x_2=\dfrac{-0+\sqrt{0^2-4\cdot(-1)\cdot98}}{2\cdot(-1)}=\dfrac{2\cdot7\sqrt{2}}{-2}=-7\sqrt2$