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Using a method that is not factorisation, solve the equation (x^2) + 3x -4 = 0. Hence, sketch the curve produced by the equation

One method that could be used to solve the equation is using the quadratic formula given by:x = ( -b ± (b 2 - 4ac) 0.5 ) / 2a where ax 2 + bx + c = 0Substituting our values into the (b 2 - 4ac) 0.5 first giv...
JW
Answered by Joseph W. • Maths tutor
3137 Views

Complete the square of the equation below.

Q. Complete the square : x 2 + 4x - 12A. Completing the square is putting the given equation into the form (x + a) 2 + bFirst, a = the coefficient of x 2so in this case a = 4 = 2 Then to find b we calculate ...
VY
Answered by Victoria Y. • Maths tutor
3372 Views

Solve algebraically the simultaneous equations (x^2) + (y^2) =25 and y - 3x = 13 (5 Marks).

The solution to simultaneous equations is where the values of x and y satisfy both equations. In this case, we need to find values of x and y that satisfy the equations x 2 + y 2 =25 and y - 3x = 13. If we n...
VG
Answered by Vaibhav G. • Maths tutor
4496 Views

A washing machine costs £500 in a sale and was reduced by 20%. What was its original price?

Maths is pretty straight forward, you just need to get the key information out the question.So, we have a washing machine that costs £500 on sale. It has been reduced by 20%, so we need to find the original ...
RS
Answered by Raghavi S. • Maths tutor
5283 Views

Factorise the expression given

2x 2 -2x+4 =2x 2 +2x-4x+4 =2x(x+1)-4(x+1) =(x+1)(2x-4)
RH
Answered by Rachael H. • Maths tutor
3190 Views