- #1

- 655

- 0

x³ - 5x = 2x - 1

can be rearranged to

x³ - 7x + 1 = 0

is that 0 the y value, and +1 where the line crosses the y axis? Is - 7x the gradient or is x³ - 7x the gradient?

Thankyou

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- Thread starter thomas49th
- Start date

- #1

- 655

- 0

x³ - 5x = 2x - 1

can be rearranged to

x³ - 7x + 1 = 0

is that 0 the y value, and +1 where the line crosses the y axis? Is - 7x the gradient or is x³ - 7x the gradient?

Thankyou

- #2

HallsofIvy

Science Advisor

Homework Helper

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- #3

- 655

- 0

Question 14 of a paper is:

A graph -2< x < 3 with points

x = -2, -1 , 0 , 1 , 2 ,3

y = 1 , 4 , 1 ,-2 , 1 ,16

I drew the graph. Now part b says

By drawing suitable lines on you graph, find all the solutions to the following equations for -2 < x < 3. Give your solutions to 1 decimal place

x³ - 5x = 2x - 1

so x³ - 7x + 1 = 0

dont know where to go from there...

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