Question

julia has framed one of her paintings. the painting is square, and the frame is 5cm wide. please help with questions a-d

Answer 1

i) x²

ii) (x-10)²

b) (x-10)² = x² - 20x + 100

c) (30-10)² = 400 cm²

d) (x-10)² = 144 => x-10 = √144 => x = 12 + 10 = 22 cm