Answer:
The polynomial that represents the perimeter of the triangle is 5x^2-5x +22.
Step-by-step explanation:
Perimeter of the triangle= a+b+c where a,b,c are the length of the sides of the triangle.
Given
a= x+3, b= x^2+3x+7, c= 4x^2-9x+12
Perimeter of the triangle = x+3 + x^2+3x+7+ 4x^2-9x+12
= 5x^2-5x +22
The polynomial that represents the perimeter of the triangle is 5x^2-5x +22.
A polynomial is an expression which has variables , constants and terms and exponents combined with addition subtraction etc.
Example 5x^2-5x +22 is a polynomial.
It has exponent, variables and constant .
