Question

If x2 + 12 = 7; find the value of : 7x3 + 8x - 7/3 - 8/

Answer 1

-9 1/3

2x+12=7

=>2x= -5

=>x= -5/2

7×3+8x-7/3-8

=21+8× -5/2-7/3-8

=21-20-7/3-8

=1-7/3-8

= -9 1/3

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Answer 2

-9 1/3

Hope it will help you ❤️❤️