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Solve 5x^2 - 4x - 3 =0. Give answers to 3 significant figures

1.27 and -0.472
MJ
Answered by Marcus J. • Maths tutor
5405 Views

Expand and simplify (x-2)(2x-3)(x+1)

2x 3 + x 2 - 7x - 6
MJ
Answered by Marcus J. • Maths tutor
4925 Views

Find the inverse function of f(x) = 5 / (x - 4)

To find the inverse of a function you follow 3 steps.Replace f (x) with x and any x variables with y Rearrange this equation into the form y = x variablesReplace the y with f ^-1 (x) and you have your answer...
KG
Answered by Kristen G. • Maths tutor
3561 Views

Solve the simultaneous equations: (3x+2y=3), (x-y=-4)

3x+2y=3 x-y=-4 First, we want to cancel out either x or y so that all we have left is the one we haven't cancelled and a number. To do this we can add or subtract the two equations, possibly multiplying one ...
RB
Answered by Rohan B. • Maths tutor
4434 Views

Which of the following lines is not perpendicular to y=2x+1? (A) y+1/2x=6 (B) 2y=4-x (C) 2x+y=4 (D) y=-1/2(7+x)

First of all, we need to figure out how to tell whether 2 lines are perpendicular. For any equation written in the form 'y=mx+c', the important bit of information we need to answer this question is the value...
OD
Answered by Oliver D. • Maths tutor
3930 Views