Assume you have a graph of the polynomial equation
m(x)=x to the 3rd power -3x to the 2nd power+8
and u want to verify algebraically a graphic solution to the nearest tenth.
Which value works? That equation again was x^3-3x^2+8
-1.5
-1.4
1.4
1.5
2006-11-26 04:32:09 · 2 answers · asked by sweetlilme17 2 in Education & Reference ➔ Homework Help
The simplest way is to plug in each of the 4 solutions.
-1.5: -1.5^3 - 3(-1.5)^2 + 8 = -3.375 - 6.75 + 8 = -2.125
-1.4: -1.4^3 - 3(-1.4)^2 + 8 = -2.744 - 5.88 + 8 = -.624
1.4: 1.4^3 - 3(1.4)^2 + 8 = 2.744 - 5.88 + 8 = 4.864
1.5: 1.5^3 - 3(1.5)^2 + 8 = 3.375 - 6.75 + 8 = 4.625
2006-11-30 02:25:21 · answer #1 · answered by ³√carthagebrujah 6 · 0⤊ 0⤋
okay if you wanted me to plug in the values (-1.5, -1.4, 1.4,1.5) u gave to me and use the formula x^3-3x^2+8
the asnswers would be
1. -2.125
2. -.624
3. 4.864
4. 4.625
all i did was insert the numbers you gave into the x spots and solve
i hope thats wat u wanted
2006-11-26 12:50:02 · answer #2 · answered by kdreads44 1 · 0⤊ 0⤋