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Secondary 1 chevron_right Maths chevron_right Singapore

Need help with question 11 thanks in advance.

Date Posted: 5 months ago
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Eric Nicholas K
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2351 answers (Tutor Details)
Important that we must change inequality sign when multiplying or dividing both sides by a negative number; do not change the signs when adding or subtracting both sides by a negative number.

In a number line, an unshaded small circle means that the reference value is NOT included as part of the solution, while a shaded dot means that the reference value is included. For example, for the inequality x > 1, we should draw an unshaded circle on top of the number 1 before drawing an arrow from that circle to the right.