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Can you explain the quadratic formula?

The quadratic formula is used to solve the quadratic equation. Although methods like factorising or completing the square can easily be used, this offers another method which can be used for more difficult e...
SI
Answered by Shazeaa I. • Maths tutor
4659 Views

Show that y=3x-2 and 3y-9x+5=0 are parallel.

Parallel lines have the same gradient (same 'm' value in y=mx+c). Therefore m=3 for both equations; if they are parallel lines. The second equation needs to be rearranged for y to determine this. 3y-9x+5 = 0...
NG
Answered by Nicole G. • Maths tutor
15368 Views

Factorise 7x +14

7(x + 2)
AM
Answered by Ajay M. • Maths tutor
8759 Views

Solve these 2 equations simultaneously: 7x+y=1 and 2x squared - y=3

7x+y=1 (1) -> y= 2x 2 - 3 (3) 7x + 2x 2 -3-1=0 -> (2x-1)(x+4)=0 so 2x-1=0 so 2x=1 so x=0.5 and x+4=0 so x=-4 7(0.5)+y=1 so y=1-3.5 so y=-2.5 and 7(-4) +y=1 so -28+y=1 so y= 29 Full answer: x=0.5 y=-2.5...
HV
Answered by Hannah V. • Maths tutor
4149 Views

Simplify p^2×p^5

When you multiply two numbers that are the same with different exponents, the number can remain the same and the exponents are added. That is an exponents rule. This means that the answer is p^7
SA
Answered by Sama A. • Maths tutor
8807 Views