3 years ago

Please Help,This is hard. If you could do it step by step that would be Great :)

Mathematics

2 answers:

Anna11 [10]3 years ago

8 0

A. Bc a negative times a negative would be positive

C. Bc it would equal 0 and zero is not negative.

1*-7=-7 it wants a negative value so times it by one keeps it negative and same with if it is Multiplied by 7

inysia [295]3 years ago

8 0

Answer:

A) $\displaystyle -3$

Step-by-step explanation:

Attaching a double negative will make the result POSITIVE in an instant.

I am joyous to assist you anytime.

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Y = x^2+ 7x - 5 can be written in the form y = (x + a)^2+b

BARSIC [14]

Answer:

see explanation

Step-by-step explanation:

The equation of a parabola in vertex form is

y = (x - h)² + k (h, k) are the coordinates of the vertex

Given y = x² + 7x - 5

To express in vertex form use the method of completing the square

add/subtract ( half the coefficient of the x- term )²

y = x² + 2( $\frac{7}{2}$ )x + $\frac{49}{4}$ - $\frac{49}{4}$ - 5

y = (x + $\frac{7}{2}$ )² - $\frac{49}{4}$ - $\frac{20}{4}$

y = (x + $\frac{7}{2}$ )² - $\frac{69}{4}$

Hence

a = $\frac{7}{2}$ and b = - $\frac{69}{4}$

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Please Help,This is hard. If you could do it step by step that would be Great :)​

Please Help,This is hard. If you could do it step by step that would be Great :)