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What are the solutions to x^2+3x+2=0

Find two numbers that multiply to give 2 and add together to give 3: 1 and 2
Factorise: (x+2)(x+1)=0
The solutions are x= -2 and x= -1
Explanation: Brackets means you multiply, this means t...

Answered by Ridwan A. • Maths tutor

1581 Views

Solve the simultaneous equations 5x + y = 21, and x - 3y = 9.

2 unknowns? Let's make it into a simpler equation you know how to solve with only one unknown! How? Key is to note that you can add and subtract equations. You can also multiply the equations by some cons...

Answered by Sara H. • Maths tutor

2400 Views

Solve the following simultaneous equations: (1) 3x – 2y = 7 (2) 5x + 2y = 17

When looking at the two equations we can see that the 'y' terms in both equations are the same, but with the opposite sign. This means that by adding the two equations we can eliminate the 'y' values.

Answered by madeleine f. • Maths tutor

3026 Views

What is the length of x?

If angle = 50 degrees, hypotenuse = x, adjacent side = 5 cm, opposite side = 7 cm, and is a right angled triangle,Use cos(theta)=adjacent/hypotenuseSo, cos(50) = 5/xrearranging the equation to make x the ...

Answered by Madison N. • Maths tutor

1640 Views