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3 years ago

Please help!

Mathematics

2 answers:

alisha [4.7K]3 years ago

5 0

Answer: I know its not up there. When I did that I got (x+6)(x-2)

Ivenika [448]3 years ago

3 0

Answer:

B. (x - 6)(x + 2).

Step-by-step explanation:

x^2 - 4x - 12

We need 2 numbers whose product is the last number -12 and whose sum is the coefficient of x (-4).

These numbers are -6 and + 2.

So the factors are (x - 6)(x + 2).

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3 years ago

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Deffense [45]

Tot ratio=11
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3 years ago

Find the equation in standard form of the parabola passing through the giving points.

zaharov [31]

Let y = ax²+bx+c then substitute all of orders. we'll be doing equations system.

$a-b+c=0\\c=3\\a+b+c=2$

Ok we are at this.

Substitute c = 3 into equation 1 and equation 3.

$a-b+3=0\\a-b=-3$

$a+b+3=2\\a+b=2-3\\a+b=-1$

then addition and subtract for a-b = 3 and a+b = -1

$a-b=-3\\a+b=-1\\2a=-4\\a=-2$

Therefore a = -2, substitute a = -2 in a-b+c=0 or a+b+c=2 but i'm doing a-b+c=0 one.

$a-b+c=0\\\\-2-b+3=0\\-b+1=0\\-b=-1\\b=1$

Therefore b = 1, substitute both a, b and c into y=ax²+bx+c as we get,

$y=-2x^2+x+3$ #

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3 years ago