Tham KY's answer to Jennie Hill's Secondary 4 A Maths question.

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Tham KY
Tham Ky's answer
6052 answers (Tutor Details)
Press Shift then Trace buttons, to choose CALC menu...
When prompted Left Bound, move cursor to left of min point then press Enter. Right bound, move cursor to right of min point then Enter. For Guess value, ignore and press Enter. Answer of minimum x and y will be displayed.