Eric Nicholas K's answer to LZmath's Secondary 1 Maths Singapore question.
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
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.
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.
Date Posted:
5 years ago
360 Tutoring Program