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Solve t^2-t=3(7+t)

Expand RHS: t 2 - t = 21+ 3tCollect all terms on one side: t 2 - 4t - 21 = 0Factorise and solve by inspection / use the quadratic formula to solve for t: (t + 3)(t - 7) = 0 / t = [ -(-4) ± ( (-4) 2 - 4x(1)x(...
CW
Answered by Charlie W. • Maths tutor
3856 Views

How do I conjugate the imperfect tense in Spanish?

The imperfect tense for all regular verbs in this tense is created by removing the ar/er/ir endings from the infinitive and adding the appropriate endings depending on the subject of the sentence (I, you, he...
JB
Answered by Jade B. • Spanish tutor
2391 Views

Solve 5x-9=26.

When a question asks us to solve an equation, it is asking us to find the value of x. We need to rearrange so that x is on one side of the equals sign, and everything else is on the other. First, we need to ...
BA
Answered by Bethany A. • Maths tutor
7990 Views

Solve the simultaneous equations algebraically

x 2 +y 2 =25 and y-3x=13Step 1 is to label the equations (1) and (2). We shall label the first equation, the quadratic, as equation (1) and the second equation, the linear, as equation (2). When solving a si...
AE
Answered by Andrew E. • Maths tutor
5308 Views

Solve the two simultaneous equations X2 +2Y2= 18 and X - Y = 3

1) X 2 +2Y 2 = 182) X - Y = 3 Rearrange 2) in the form X=3-Y then substitute in to 1); (3-y) 2 +2Y 2 =18, this is your new equation 39+3Y+3Y+Y 2 +2Y 2 =183) 9+6y+3Y 2 = 18Divide equation 3) by 33 +2Y+Y 2 =6S...
RC
Answered by Rebecca C. • Maths tutor
5088 Views