Question

5. Simplify the following expressions and evaluate them as directed:

5xy(3x + 4y - 7) - 3y(xy – x2 + 9) - 8 for x = 2, y = -1
6. Add the following:
(i) 4p(2 - p2) and 8p3 – 3p
(ii) 7xy(8x + 2y - 3) and 4xy?(3y - 7
7. Subtract:
(i) 6x(x – y +z) – 3y(x + y - z) from 23(-x + y + z)
(ii) 7xy(x2 - 2xy + 3y2) - 8x(xy - 4xy + 7xy2) from 3y(4x+y - 5xy + 8xy?)​

Answer 1

Answer:

big question ...........

Step-by-step explanation:

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