2017年12月2日 · Integral 3 Let u=x^2+9 and (du)/dx=2x and divide through by 2x: -int\ x/(x^2+9)\ dx=-int\ 1/(2cancelx)cancelx/u\ du=-1/2int\ 1/u\ du=-1/2ln|u| Now we resubstitute, and since …

2018年3月23日 · x=-9/28+-sqrt(60/7) larr" Exact answer" The sub topic name chosen is quadratics! So you must mean: 7/3(x+9/28)^2=20 Multiply both sides by 3/7 (x+9/28)^2=60/7 …

2018年6月10日 · x = 1 7x + 9 = 16 Subtract 9 from both sides 7x + cancel9 - cancel9 = 16 -9 7x = 7 x = 7/7 = 1. Algebra Linear Equations Two-Step Equations and Properties of Equality

2017年9月30日 · First, expand the terms in parenthesis by multiplying each term within the parenthesis by the term outside the parethesis:

2016年3月15日 · Answer: x=-7/2+-sqrt(85)/2 or x approx -8.11 or 1.11 To solve by completing the square, first add 9 to both sides x^2+7x=9 Then you have to manipulate the number in front of …

2015年9月24日 · How do you simplify first and then solve #−(1 + 7x) − 6(−7 − x) = 36#?

2015年9月10日 · So the answered is x = 2 and y = -3 In order to solve x + 3y = -7 and -x + 2y = -8, you must use the elimination method for solving linear equations. In this case, you will have …

How do you simplify #(9 times 10^7)(7 times 10^9)# and write the answer in scientific notation? How do you simplify #(8 times 10^8)(9 times 10^10)# and write the answer in scientific …

2015年8月1日 · color(red)(x=16) log(x+9) = log (2x-7) Convert the logarithmic equation to an exponential equation. 10^( log(x+9)) = 10^( log (2x-7)) Remember that 10^logx =x, so x+9 = 2x …

Since one of the factors of the denominator is of second degree we apply partial fractions decomposition as: #1/((x+7)(x^2+9)) = A/(x+7)+ (Bx+C)/(x^2+9)#