4x+y+6z=7 3x+3y+2z=17 -x-y+z=19
1 answer:
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Answer:
f(x) = 3x^2 -21x +36
Step-by-step explanation:
The table gives the x- and y-intercepts, which are sufficient to write the equation in factored form. The x-intercepts of 3 and 4 tell you that factors are (x -3)(x -4). When x=0, this product is (-3)(-4) = 12, but the y-intercept value is 3 times that: 36. So, the factored equation is ...
f(x) = 3(x -3)(x -4)
Multiplying this out, we get ...
f(x) = 3(x^2 -7x +12)
f(x) = 3x^2 -21x +36
Any number to the power of a negative integer will be 1 over that number with the absolute value of the power, so it looks like this:
Therefore, you just need to 8² which is 64, and then do 1 over that (1/64) because it's a negative power.