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If y = 4x^3 - 6x^2 + 7 work out dy/dx for this expression

y = 4x^3 - 6x^2 + 7 dy/dx = 12x^2 -12x
MQ
Answered by Matilda Q. • Maths tutor
3526 Views

Can you explain how to find straight line equations?

Straight line equations always come in the form y=mx+c, where m is the gradient of the line (how steep it it) and c is the point where the line crosses the y axis (the y intercept).If you are given two point...
JQ
Answered by Judy Q. • Maths tutor
2902 Views

Solve the following quadratic equation.

x 2 +7x+10 = 0 factorise this into the form (x+a)(x+b)=0 by finding out what 2 numbers multiply to make 10 and add up to 7. the 2 numbers that fit this criteria are 5 and 2 so (x+5)(x+2)=0, if we expanded th...
AG
Answered by Amber G. • Maths tutor
3583 Views

Expand the brackets: (x + 5)(x - 3)?

An easy way to remember how to expand double brackets is using FOIL . FOIL stands for First , Outer , Inner , and Last . First indicates that we multiple the first two terms of each bracket (x * x = x 2 ). O...
DW
Answered by Daniel W. • Maths tutor
5222 Views

Calculate the interest on borrowing £40 for 3 years if the compound interest rate is 5% per year.

The method for finding compound interest is: Original Amount x Multiplier Time So, from the question we know that: Original Amount= 40, Time= 3 years, so we say 3 Next we need to work out the multiplier: The...
KB
Answered by Kathleen B. • Maths tutor
4156 Views