Ian Tan's answer to kristen's Secondary 4 A Maths Singapore question.
thank you! but how come u multiply by negative x when u let x coordinste of q to be x?
Since x lies on the left side of y axis, it is negative in value.
Since side of rectangle cannot be negative, you need to put a negative sign next to x to make the length positive.
Since side of rectangle cannot be negative, you need to put a negative sign next to x to make the length positive.
ohhh okayy! is it something like 0-x ? i think i got it ! thank you so much!
You are welcome
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