Step-by-step explanation:

Answer:
x^2-10x+25
Step-by-step explanation:
(a+b)^2=a^2+2ab+b^2 so a=x and b=-5 so the expression is x^2-10x+25
One of the many ways to solve the area of a triangle is to divided by two the product of its base (b) and height (h). Which can be expressed as,
A = (b x h) / 2
Substituting the given base and height to the equation,
A = (5.4 cm x 2 cm) / 2 = 5.4 cm^2
Therefore, the area of the triangle is 5.4 cm^2.