Top answers

What is the method to solve an equation of type : ax^2+bx+c = 0 ?

This kind of equation is called a quadratic or a polynomial of degree 2.The goal when faced with a quadratic is to solve it as fast as possible. We do this in two steps. First, we check if there is an easy w...
AV
Answered by Antoine V. • Maths tutor
5465 Views

Integrate the function (3x+4)^2 using methods of expansion and substitution

For expansion:(3x+4) 2 =9x 2 +24x+16, go through expansion in online classroom. Now we integrate this using standard polynomial integration rules. For substitution: use the substitution u=3x+4, and use the i...
MR
Answered by Morgan R. • Maths tutor
4438 Views

Simplify fully (x^2 + 3x)/(4x + 12) ​

First, factorise both the top and the bottom expressions. What is the common factor for the top expression? (expect an answer of x). If you factorise out the x, what are you left with? (expect x(x+3))What is...
MP
Answered by Martha P. • Maths tutor
3810 Views

Work out 51% of 400

0.51x400 =204
RN
Answered by Rachel N. • Maths tutor
4940 Views

Find the tangent to the curve y = x^3 - 2x at the point (2, 4). Give your answer in the form ax + by + c = 0, where a, b and c are integers.

y = x 3 - 2xdy/dx = 3x 2 -2plugging in x = 2, therefore gradient = 10using the formula to get the equation of a line y -y 1 =m(x - x 1 )substitute y 1 =4 and x 1 =2 to get the answer-10x + y + 16 = 0
KS
Answered by Kevalee S. • Maths tutor
6403 Views