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SPOT THE ERRORS AND EXPLAIN IN WRITING WHAT MUST BE DONE TO DO IT CORRECTLY.


SPOT THE ERRORS AND EXPLAIN IN WRITING WHAT MUST BE DONE TO DO IT CORRECTLY class=

Sagot :

STUDENT A is wrong. It should be:

9x³ - 2x² + 7x - 4

=9(-2)³ - 2(-2)² + 7(-2) - 4

=9(-8) - 2(4) + 7(-2) - 4

= -72 - 8 - 14 - 4

= -98

STUDENT B is also wrong. It should be:

9x³ - 2x² + 7x - 4

=9(3)³ - 2(3)² + 7(3) - 4

=9(27) - 2(9) + 21 - 4

= 243 - 18 + 21 - 4

=242