In the figure, the width of the border of the picture is x cm. The picture has an area of 160 cm².(i) Form an equation in x and show that it reduces to x² - 18x + 40 = 0.
(ii) Solve the equation x² - 18x + 40 = 0, giving both your answers correct to 2 significant figures.
(iii) Write down the width of the border, giving your answer correct to 2 significant figures.

Question

In the figure, the width of the border of the picture is x cm. The picture has an area of 160 cm².(i) Form an equation in x and show that it reduces to x² - 18x + 40 = 0.
(ii) Solve the equation x² - 18x + 40 = 0, giving both your answers correct to 2 significant figures.
(iii) Write down the width of the border, giving your answer correct to 2 significant figures.
In the figure, the width of the border of the picture is x cm. The picture has an area of 160 cm². (i) Form an equation in x and show that it reduces to x² - 18x + 40 = 0. (ii) Solve the equation x² - 18x + 40 = 0, giving both your answers correct to 2 significant figures. (iii) Write down the width of the border, giving your answer correct to 2 significant figures.

aldik1066 · Accepted Answer

Jawaban:the answer is 3²×3÷5= eight hundred and thirty thousand rupiah

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