shannonhausmann
shannonhausmann
28-01-2015
Mathematics
contestada
Algebra 2
Solve: f(x)=x^2-9
Respuesta :
blackwelldavid
blackwelldavid
28-01-2015
This problem is a difference of squares. So to solve this you want to factor it out so you get two numbers that multiple to -9 and add to 0. That would be -3 and 3
f(x)=(x-3)(x+3)
So your solution when you set f(x) to 0 would be -3 and 3.
Answer Link
VER TODAS LAS RESPUESTAS ( 53+ )
Otras preguntas
if x= 1/2-√3 , prove that x³-2x²-7x+5=3
removing the dimensional prefix and express in scientific notation ( include unit)7.4nm6.78 x 10^8 MHz5.36 x 10^6 kV1500mACalculate the following numbers into s
One side of a triangle is 1 in. longer than the shortest side and is 1 in. shorter than the longest side. The perimeter is 17 in. Find the dimensions of the t
A student investigated how the pressure in a diving pool varied with depth. He filled a balloon with helium and tied it to the end of a long pole. Then he subm
One side of a triangle is 1 in. longer than the shortest side and is 1 in. shorter than the longest side. The perimeter is 17 in. Find the dimensions of the t
if x= 1/2-√3 , prove that x³-2x²-7x+5=3
which of the following is the the correct factorization of this trinomial. -3x^2-10x-8 a) (-3x+4)(x-2) b) -(x+4)(x-3) c)-(3x+4)(x+2) d) -3(x+4)(x+2)
what are valency and radicals
Assume that the sales of a computer retail store are approximated by a linear function. Sales were $990,000 in 1983 and $2,830,000 in 1988. Let x=0 represent 19
1. x=1/(root3-root2). find rootx-(1/rootx) 2. if x=[root(a+2b)+root(a-2b)]/[root(a+2b)-root(a-2b]. show that bx^2-ax+b=0
