Textbook Question
Answer the following. Why must -4 be in the solution set of ? (Do not solve the inequality.)
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Answer the following. Why must -4 be in the solution set of ? (Do not solve the inequality.)
Answer the following. Why can 3 not be in the solution set of 14x+9 / x-3 < 0? (Do not solve the inequality.)
Solve each equation. See Examples 8 and 9. 2x-2/5-x-1/5-1=0
Work each problem. Show that -2+i is a solution of the equation x²+4x+5=0.
Solve each equation for the specified variable. (Assume all denominators are nonzero.) x2/3+y2/3=a2/3, for y
Solve each equation or inequality. |x+4| = 7