Question

NO SPAM ANSWRS ALOUD PLEASE.
5. Simplify the following expressions and evaluate them as directed
(ii) 5xy(3x + 4y - 7) - 3y(xy - x2 + 9) - 8 for x = 2, y = -1​

Answer 1

Answer:

-14

Step-by-step explanation:

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Answer 2

Answer:

51

Step-by-step explanation:

if

x = 2, y = -1

p(x,y) = 5xy(3x+4y-7) - 3y(xy-x²+9)-8

p(2,-1) = 5×2×(-1) × [(3×2)+{4×(-1)}-7] - {3×(-1)} × [{2×(-1)}-(2²)+9] -8

= -10× (6+-4-7) - (-3) ×(-2-4+9)-8

= -10×(6-11) - (-3)×(9-6)-8

= (-10)×(-5) - (-3×3) -8

= 50- (-9) -8

= 50+9 -8

= 59-8

= 51

hope it helps..