College Algebra / Alg 160 · Atom · ~20 seconds
The Multiplication Property of Inequality
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The multiplication property of inequality preserves direction for positive multipliers and reverses it for negative ones; multiplying or dividing by a negative flips the symbol.
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−2x < 6 divides by −2 into x > −3 — symbol flipped. Test x = 0: both lines hold.
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