How do you do ninth grade polynomial equations?

Answer 1

One part of learning polynomials are the basic polynomial functions, which i have done in ninth grade. take this-

p(x)=5 - 4x + 2x2 (this is just an example)

now take this-

p(1)=5 - 4(1) + 2(1)2

When we write p(1), we substitute all x's by 1. In the third term, we square 1, and multiply it with 2.

So, p(1)=5 - 4 + 2 = 3

you can do the same with this-

p(2)=5 - 4(2) + 2(2)2

Again, we substituted all x's by 2. now we must find the square of 2, which is 4, and multiply it by 2

So, p(2)=5 - 8 + 8 = 5

Here is one more-

p(-3)=5 - 4(-3) + 2(-3)2

Now here, we substitute x with -3. This time, its a negative number. The square of -3 is 9, in the third term. Here-

p(-3)=5 + 12 +18 = 35

an negative multiplied by a negative is always a positive, so in the second term, -4 x -3 is 12, so it becomes positive.

This is my first math article I've written till now, and I deeply thank everyone who read this and liked it! =D