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!! :-)