Factorise the expression (c+2d)^2-(c+2d)(3c-7d)

(c+2d)(9d - 2c) =

Step-by-step explanation:

Both sides have (c+2d) so pull out (c+2d)

(c+2d) [(c+2d) - (3c-7d)]

(c+2d) [c+2d - 3c +7d]

(c+2d) [-2c + 9d] = (c+2d)(9d - 2c)

(c+2d)(9d - 2c) = =

Hope this helps ^-^

dwe

step-by-step explanation:

ewd

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation: