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How Do You Simplify 2x / X^2-3x-10 3

Expand & simplify (x - 2)(x + 5)?!?!?

x^2+5x-2x-10
x^2+3x-10

1st multiply the brackets out so x times x =x^2, x times 5 = 5x, -2 times x = -2x, -2 times 5 = -10;
then group same numbers so th only ones you can do anything with is 5x and -2x = 3x

. Simplify the rational expression:X^2+3x-10/x^2+x-20?

(x^2 + 3x - 10)/(x^2 + x - 20)
= (x^2 + 5x - 2x - 10)/(x^2 + 5x - 4x - 20)
= [(x^2 + 5x) - (2x + 10)]/[(x^2 + 5x) - (4x + 20)]
= [x(x + 5) - 2(x + 5)]/[x(x + 5) - 4(x + 5)]
= (x + 5)(x - 2)/(x + 5)(x - 4)
= (x - 2)/(x - 4)

Need help with 2 simple math questions.. 10 easy points!?

1. Same way as you do for two variables, just it involves few more steps for 3 variables.
Add first two eqn.(eliminate Z) 3x+2y=4.........(4)
Multiply 2nd eqn by 2 and add to 3rd eqn. 7x-4y=5.......(5)
Now multiply (4) by 2 and add to (5)
13x=13
x=1 Now work out values of y from either (4) or (5) y=0.5
and find Z from eqn (1) or (2). z=-3.
Always plug in the values back in given equation to check the answers.

2.
First expression is x(x-3)/(x-5)(x+2)
Second expression is (x-3)(x+2)/(x+2)(x-2)
=(x-3)/(x+2)
The required quotient=x(x-3)(x+2)/(x-5)(x+2)(x-3)
=x/(x-5)

How do you solve this inequality, 4 + 2x > 3, and this inequality, 2 + 3 (x - 4) < 3 (2x - 5)?

Let's solve each inequality one by one.• 4+2x>3Subtracting 4 from both sides2x>-1Dividing by 2 on both sidesx>-1/2• 2+3(x-4)<3Simplifying,3(x-4)<1=> x-4<1/3=> x<13/3So, -1/2

Simplify this equation and multiply and simplify the 2nd one?

1)
x2 + x - 12 / (2x2-3x-9)
(x+4)(x-3) / (2x+3)(x-3)
(x+4) / (2x+3)


2)
x2-x-20 / x2-3x-10 * x2+7x+10 / x2+4x-5
(x-5)(x+4) /(x-5)(x+2) * (x+5)(x+2) / (x+5)(x-1)
(x+4)/(x+2) * (x+2)/(x-1)
(x+4) / (x-1)


3)
3(sqrt(48) - 12(sqrt(75) + 4(sqrt(12)
3(sqrt(16)sqrt(3) - 12(sqrt(25)sqrt(3) + 4(sqrt(4)sqrt(3))
3(4sqrt(3)) - 12(5sqrt(3) + 4(2sqrt(3)
12sqrt(3) - 60sqrt(3) + 8sqrt(3)
-40sqrt(3)

What does 6 X 1012 times 3 X 10-9 divided by 2 X 10-17 equal?

[(6 x 10^12)*(3 x 10^-9)]/(2 x 10^-17)
=[(6*3)/2] x [10^(12-9-(-17))]
=9 x 10^(12-9+17)
=9 x 10^20#

Help with algebra math?

Hi,

65 grams x 10 = 650 grams x 1 kg/1000 g = .65 kilograms

.65 kilograms x $5.50/kg = $3.58 <==ANSWER

Solve for x:
4(x – 1) + 2 = 3x + 8 – 2x

4x - 4 + 2 = 3x + 8 - 2x

4x - 2 = x + 8

3x = 10

x = 10/3 <==ANSWER




Translate to an algebra statement; do not solve:
Three times the sum of a number and seven yields the same result as twice the same number decreased by four.

3(x + 7) = 2x - 4 <==ANSWER

I hope that helps!! :-)

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