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which expression is equivalent to x^2-4? (x-2)^2 (x-2)(x+2) (x+2)(x+2) x^2(-4)

(x-2)(x+2) because the x values cancel out leaving the integer and x^2 value.
BS
Answered by Bronte S. • Maths tutor
4773 Views

How to make something the subject of the formula?

Make a the subject of the formula from : p = (3a + 5)/(4 - a) When doing questions like these it is best to remember that if you multiply one side of the equation you have to do the same thing on the other s...
RC
Answered by Robin C. • Maths tutor
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Solve the following equation: 6x – 9 > 4x + 3

2x - 9 > 3, 2x > 12, x > 6
SM
Answered by Sean M. • Maths tutor
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How to solve how many sweets Hanna had?

This was a GCSE question in 2015. There are n sweets in a bag. 6 of them are orange, the rest are yellow. Hanna takes a random sweet from the bag and eats it. She then takes another random sweet and eats tha...
CM
Answered by Callum M. • Maths tutor
4235 Views

Expand and simplify (x-7)^2

Write out the question fully like so: =(x-7)(x-7) 2. Expand the brackets using the FOIL method. i.e First Outer Inner Last or the Crab Claw Method You should get: = x^2 - 7x - 7x + 49 Be careful with signs, ...
AC
Answered by Aisling C. • Maths tutor
33148 Views