Respuesta :
Answer:
Isosceles triangle is a triangle that has two sides of equal length.
Perimeter of isosceles triangle is given by:
or P = a+a+b where a is the equal of length sides and b is the unequal side length side.
Given: Two congruent sides each of has length = 2x-1.5 unit and third side has length x+3.
⇒ and b = x+3
By definition of Perimeter;
P = 2a+b
P=2(2x-1.5)+x+3
P= 4x - 3 + 3 [Using distributive property]
Simplify:
P = 4x
Therefore, two equivalent expression for the perimeter of isosceles triangle are;
P=2(2x-1.5)+x+3 or P = 2x -1.5 + 2x-1.5 + x+3
P = 4x
Answer:
2x+3 = 7
2x = 7-3
2x =4
x=2
Just the same as finding x^2
(x+2)^2 + 3x - 7x + 2x
4x^2 + 3x - 7x +2x
x^2 = 2x
x = 1
