How to subtract and add polynomials

To subtract, first reverse the sign of each term we are subtracting (in other words turn "+" into "-", and "-" into "+"), then add as usual.

To add here is an example not sure if entirely right but here it is.

Start with:2x2 + 6x + 5 + 3x2 − 2x − 1.

Place like terms together:2x2+3x2 + 6x−2x + 5−1.

Which is:(2+3)x2 + (6−2)x + (5−1)

Add the like terms:5x2 + 4x + 4

y + 11 = (1/4)(x + 16)

step-by-step explanation:

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204