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nadya68 [22]
3 years ago
9

Which explains how to show that x= -8/3 is a root of 9x^2+48x+64= 0 ?

Mathematics
1 answer:
Helen [10]3 years ago
4 0

Step-by-step explanation:

9 {( -  \frac{8}{3}) }^{}  {}^{2}  + 48( -  \frac{8}{3} ) + 64  \\  \\ 9( -  \frac{64}{9} ) -  \frac{48}{3}  + 64  \\  \\  - 64 - 16 + 64 =  - 16

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