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factorise x^3 + 3x^2 - 13x - 15

For convience we can call the polynomial f(x). Using the fact that the product of the roots of a polynomial equals the constant term, we know that the product of the roots is -15. We can therefore guess a...

BI
Answered by Ben I. Maths tutor
5457 Views

The Diagram shows the Triangle PQR. PQ = x cm. PR = 2x cm. Angle QP^R = 30 degrees. The area of the triangle PQR = A cm^2. Show that x = (Squared Root){2A

Area of a Triangle Formula is
A = 1/2 abSINc
Label the sides of the triangle PR = 2x = a PQ = x = b
1/2 (x) 2x (x) x (x) SINc = A = x2 SINc
Rearrange the equation to give...

TD
Answered by Tutor305386 D. Maths tutor
10271 Views

I am thinking of two numbers. When I add my numbers, the answer is 1 When I multiply my numbers, the answer is 0.09 What are my numbers?

think of ways to add up 1.
0.5 x 20.4 and 0.60.3 and 0.70.2 and 0.80.1 and 0.9 then multiply them and you'll find the last one to be correct

OB
Answered by Omar B. Maths tutor
11395 Views

Sketch the curve y=x^2-x-6

This curve is a quadratic due to the highest power in the equation being two. Quadratics typically have the shape of a U. Due to the coefficient of the x^2 term being positive, the curve is increasing for...

MA
Answered by Masum A. Maths tutor
6226 Views

Solve the simultaneous equations 'x-2y=3' and 'x^2+2y^2=27'

Equation 1: x-2y=3Equation 2: x2+2y2=27The easiest way to do this is to put one of these equations into the other, by rearranging for either x or y. Because there are no squares to d...

TK
Answered by Tahmid K. Maths tutor
6775 Views

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