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(x + 5)(x + 6)

5x + 35 + xy + 7y

+ 3 + 3

Solve the problem.A formula for the focal length of a lens isf = Calculate f (the focal length) for a = 20 cm and b = 13 cm. Round to the nearest tenth of a centimeter when necessary.

x2 – 3x – 40

(x – 5)(x2 + 5x + 10)

is the process of writing an expression as a product.

Find the cube root.-

x2 + 5x – 3 = 0

8×2 – 9x + 3 = 0