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Polynomials

# Add polynomials to find perimeter

Find the perimeter of the following rectangle.

To find the perimeter, add the lengths of the four sides:

 P = (3x+2)+(x+4)+(3x+2)+(x+4) Set it up! = (3x+x+3x+x)*(2+4+2+4) Regroup = 8x+12 Combine like terms

Find the perimeter of the following rectangle by using the formula P=2L+2W, where L represents the legth and W represents the width of the rectangle.

To find the perimeter, let L=2x+3 (the legth) and W=x+1 (the width) and plug these values into the formula P=2L+2W.

 P = 2(2x+3)+2(x+1) Substitute for L and W = 4x+6+2x+2 Use the distributive property = (4x+2x)+(6+2) Regroup = 6x+8 Combine like terms