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3 years ago

Im high & kinda slow help out .

Mathematics

1 answer:

hoa [83]3 years ago

5 0

Answer:

In google

Step-by-step explanation:

Is all

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3) Solve each equation using the quadratic formula. Show<br> a. x2 – 3x – 10 = 0

Naya [18.7K]

Answer:

Step-by-step explanation:

The quadratic formula of a quadratic equation

$ax^2+bx+c=0\\\\\text{If}\ b^2-4ac>0\ \text{then the equation has two solutions}\ x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}$

$\text{If}\ b^2-4ac=0\ \text{then the equation has one solution}\ x=\dfrac{-b}{2a}$

$\text{If}\ b^2-4ac$

We have:

$x^2-3x-10=0\to a=1,\ b=-3,\ c=-10\\\\b^2-4ac=(-3)^2-4(1)(-10)=9+40=49>0\\\\x=\dfrac{-(-3)\pm\sqrt{49}}{2(1)}=\dfrac{3\pm7}{2}\\\\x=\dfrac{3-7}{2}=\dfrac{-4}{2}=-2\\or\\x=\dfrac{3+7}{2}=\dfrac{10}{2}=5$

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3 years ago

Who knows math very well? :)))

Jlenok [28]

Answer:

I am perfect in maths

I got full marks in maths

Ask me

4 0

2 years ago

Find (g o f)(-1). *

klio [65]

Answer:

D -9

Step-by-step explanation:

(g o f)(-1) = g(f(-1))

f(-1) = $f(-1) = (-1)^{2} + 2(-1) - 3\\= 1 - 2 - 3\\= -4$

g(-4) = -4 - 5 = -9

So, (g o f)(-1) = -9

6 0

3 years ago

Which phrase represents the meaning of the symbol ?

NeTakaya

Answer:

C. Greater than.

Step-by-step explanation:

5 0

3 years ago

Simplify<br> (7x - 7)(x + 1)

Nadusha1986 [10]

We will use the FOIL method to solve this.

(7x-7)(x+1)

Multiply 7x by x. Then, multiply 7x by 1. Then, multiply -7 by x. Then, Multiply -7 by 1.

$7x^{2} + 7x - 7x -7$

Now, we need to simplify by combining like terms.

$7x^{2} -7$

If you look, -7x and 7x are gone. This is because they cancel each other out.

I hope this helped and maybe consider giving me brainliest :)

5 0

3 years ago