Mathematics: PLZ HELP!dont just answer something random for points:)tysm

PLZ HELP!dont just answer something random for points:)tysm

Ответ:

carolyvillanueva

04.03.2021

Mathematics

$4(x^{2} -4)^{2} -76$

Step-by-step explanation:

Take out 4:

4(x^2-8x)-12

=4(x^2-8x+16-16)-12

=4(x^2-8x+16)-64-12

=4(x^2-4)^2 - 76

= $4(x^{2} -4)^{2} -76$

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Ответ:

lanashanabJHsbd1099

29.03.2020

Mathematics

$\left\{\begin{array}{ccc}x=-2y-3&|+2y\\8y-4x=-12&|:4\end{array}\right\\\underline{+\left\{\begin{array}{ccc}2y+x=-3\\2y-x=-3\end{array}\right}\qquad|\text{add both sides of equations}\\.\qquad4y=-6\qquad|:4\\.\qquad y=-1.5\\\\\text{substitute the value of y to the first equation}\\\\x=-2(-1.5)-3\\x=3-3\\x=0\\\\\ x=0\ and\ y=-1.5\to(0,\ -1.5)$

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PLZ HELP!
dont just answer something random for points:)tysm

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dont just answer something random for points:)tysm