If ab ≠ 0 and , which of the following could be b in terms of a?
I.
II.
III.
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is it E) or C)?
thank you for sharing
thanks!
Great!
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Love how you solved this
Explanation\nSolved the equation for x:\n- $a^2b^2-ab=x^2-x=12$\n- $x=4$ and $x=-3$\nSolved for b\n- $ab=4$ then $b=4/a$\n- $ab=-3$ then $b=-3/4$
Can someone explain it other way?
What it tests
Your ability to manipulate linear and quadratic expressions, substitute unknowns, and solve equations under time pressure.
Common trap
Losing a sign when moving terms across the equals sign, or dividing both sides by a variable that could equal zero.