Question

Find the value of 5a²b +9ab-20a when a = 0 and b=-3
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Answer 1

$</p><p>\begin{gathered}2( {a }^{2} + ab) + 3 - ab \\ value \: \: of \: \: a = 5 \: \: and \: \: b = ( - 3) \\ \\ 2( {(5)}^{2} + 5 \times ( - 3)) + 3 - (5 \times ( - 3)) \\ \\ 2(25 - 15) + 3 - ( - 15) \\ \\ 2 \times 10 + 3 + 15 \\ \\ 20 + 18 \\ \\ 38\end{gathered}2(a2+ab)+3−abvalueofa=5andb=(−3)2((5)2+5×(−3))+3−(5×(−3))2(25−15)+3−(−15)2×10+3+1520+1838</p><p>$

Answer 2

Answer:

p><p>

2(a

2

+ab)+3−ab

valueofa=5andb=(−3)

2((5)

2

+5×(−3))+3−(5×(−3))

2(25−15)+3−(−15)

2×10+3+15

20+18

38

2(a2+ab)+3−abvalueofa=5andb=(−3)2((5)2+5×(−3))+3−(5×(−3))2(25−15)+3−(−15)2×10+3+1520+1838</p><p>

Step-by-step explanation:

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