Question

Solve by completing the square: A rectangular patio has a length of x + 6 m, a width of x + 8 m, and a total area of 400 m². Find the dimensions to the nearest tenth.

Find the radius of a circular lid with an area of 12in.².

Answer 1

(x+6)(x+8)=400
x^2+14x+48=400
x^2+14x+49=401
(x+7)^2 = 401
x+7 = ±√401
x = -7±√401

πr^2 = 12
r^2 = 12/π
r = √(12/π)

Answer 2

Thank you SO MUCH anonymous