Subtract the sum of ( 8a – 6a2 + 9 ) and (-16a -10 + 9a2
) from -3
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Step-by-step explanation:
8a - 6a^2 + 9 ----- ( 1 )
- 16a + 9a^2 - 10 ------ ( 2 )
Multiplying 1 equation by 9 and 2 equation by 6
72a - 54a^2 + 81 ------ ( 3 )
- 96a + 54a^2 - 60 ------ ( 4 )
subtract equation 4 by 3
- 96a + 54a^2 = - 60
- 72a - 54a^2 = + 81
- 168a = 21
a = 21
- 168
a = 0.125
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