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3 years ago

Pls helppp :))

Mathematics

1 answer:

kirza4 [7]3 years ago

4 0

Answer:

$x=3,-7$

Step-by-step explanation:

We can solve for x by using $\frac{-b\pm\sqrt{b^{2} -4ac} }{2a}$

By applying this on the quadratic equation, we get:

$x=\frac{-4\pm\sqrt{4^{2}+84} }{2}$

Which simplifies to:

$x=\frac{-4\pm10}{2}$

$\therefore x=3,-7$

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I really need this thank you

a_sh-v [17]

slope intercept form: y=mx+b

y=2x-3

slope is also m

b is the y-intercept

answer:

slope is 2

y-intercept is -3

8 0

3 years ago

−9x (5x+4 ) +10 (x+3) can someone please solve his for me thank u step by step please i really need to find out how to do it

Ivahew [28]

Answer:

-45 $x^{2}$ -26x+30

Step-by-step explanation:

So first you let's divide this equation into three parts.

Part one -9x(5x+4)

Step one: you have to distribute the -9x to the numbers in the parentheses. That would leave us with a -9x*5x = -45 $x^{2}$ and -9x*4 = -36x
Step two: Put the answers together. That would leave us with -45 $x^{2}$ -36x.

Part two 10(x+3)

Step one: you have to distribute the 10 to the numbers in the parentheses. That would leave us with a 10*x = 10x and 10*3 = 30
Step two: Put the answers together. That would leave us with 10x+30

Part three solve

Step one: combine and put together what you have solved for. That would leave us with a -45 $x^{2}$ -36x+ 10x+30
Step two: combine like terms. The like terms here are -36x and 10x. When you combine them you would get -26x.
Step three: Write the equation in standard form. Therefore the answer is -45 $x^{2}$ -26x+30.

Let me know if anything is confusing!

5 0

3 years ago

I really don't understand all of this

PolarNik [594]

Answer:

Step-by-step explanation:

Distribute each one like a robot

Or factor it like a human.

5(x+2y - 3)

5 0

3 years ago