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Mathematics

1 answer:

Andru [333]3 years ago

4 0

Hi there! The answer is A. This is because, 6•3=18 and 10•3=30. Hope this helps and please mark brainliest!

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4 years ago

Write the quadratic function y = x2 + ax (assuming a is nonzero) in vertex form.

konstantin123 [22]

Get into form y=a(x-h)²+k where (h,k) is vertex

some terms:
quadratic coefient: number in front of the x² term
linear coefient: number in front of the x term

basically complete the square
so
y=x²+ax
first factor out the quadratic coefient (1),
y=1(x²+ax)
take 1/2 of the linear coefient and square it
$\frac{a}{2}=\frac{a}{2}$ , $(\frac{a}{2})^2=\frac{a^2}{4}$
add positive and negative of it inside the parentesees
$y=1(x^2+ax+\frac{a^2}{4}-\frac{a^2}{4})$
factor perfect square
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distribute
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so invertex form, it is
$y=1(x+\frac{a}{2})^2-\frac{a^2}{4}$ or
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4 0

4 years ago