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3 years ago

In functions, what does (x+2)(x-4) equate to?

Mathematics

1 answer:

dimaraw [331]3 years ago

6 0

Answer:

f(x) = x^2 -2x -8

Step-by-step explanation:

(x+2)(x-4)

FOIL

first: x*x = x^2

outer: -4x

inner: 2x

last: 2*-4x = -8

Add together

x^2 +2x-4x-8

x^2 -2x -8

This is a parabola

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2 years ago

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TEA [102]

Answer:

$x = \dfrac{-\log 7}{\log 7 - \log 2}$

Step-by-step explanation:

$2^x = 7^{x + 1}$

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3 years ago

Give that the line y=4x-14 passes through the point (k,k+1), find the value of k.

balandron [24]

Answer:

k = 5

Step-by-step explanation:

The given line is y = 4x - 14.

The given point is (k, k + 1).

For this point, x = k and y = k + 1.

You substitute these equations into the line's equation to find the value of k.

(x = k)

(y = k + 1)

y = 4x - 14

(k + 1) = 4(k) - 14

Solve for k.

k + 1 = 4k - 14

Subtract k from both sides.

1 = 3k - 14

Add 14 to both sides.

15 = 3k

Divide both sides by 3.

15/3 = k

Simplify.

5 = k

And that's the answer!

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2 years ago

What is the slope of a line perpendicular to Line AB given A (6,2) and B (-3,2)

GarryVolchara [31]

Answer:

slope is undefined

Step-by-step explanation:

Calculate the slope m of AB using the slope formula

m = $\frac{y_{2}-y_{1} }{x_{2}-x_{1} }$

with (x₁, y₁ ) = A(6, 2) and (x₂, y₂ ) = B(- 3, 2)

m = $\frac{2-2}{-3-6}$ = $\frac{0}{-9}$ = 0

A line with a slope of zero is a horizontal line, parallel to the x- axis.

Thus a line perpendicular to AB is a vertical line parallel to the y- axis.

The slope of a vertical line is undefined

8 0

2 years ago

In functions, what does (x+2)(x-4) equate to? ​

In functions, what does (x+2)(x-4) equate to?