27-08-2018
Mathematics

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

julia has framed one of her paintings the painting is square and the frame is 5cm wide please help with questions ad class=

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27-08-2018

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

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