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3 years ago

Factor the expression 4x^2 +12x -72

Mathematics

1 answer:

Ray Of Light [21]3 years ago

7 0

Answer:

$\boxed{\bold{\left(3x-2\right)^2}}$

Step By Step Explanation:

Rewrite $\bold{9x^2-12x+4}$

$\bold{\left(3x\right)^2-2\cdot \:3x\cdot \:2+2^2}$

Rewrite Equation

$\bold{\left(3x\right)^2-2\cdot \:3x\cdot \:2+2^2}$

Apply Perfect Square Formula $\bold{\left(a-b\right)^2=a^2-2ab+b^2: \ a=3x,\:b=2}$

$\bold{\left(3x-2\right)^2}$

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Answer:

No because it contains points (3,4) and (3,-4). You cannot have a x assigned to more than one y-value if you want it to be a function.

Step-by-step explanation:

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If we are trying to determine if the given is a function of x, then x is the input.

However I can get two outputs from plugging in x=3.

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----Also!

If you graph the equation, it is a circle with radius 5 and center (0,0). So I could I plug in any number for x between -5 and 5 excluding -5 and 5 which would yield only one output each. Since plugging in either one gives:

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