Expand and Simplify: 16=(x-3)(x+3)
16 = (x-3)(x+3) --> 16 = x^2+3x-3x-9 --> 16 = x^2-9 --> x^2=25 --> x = +5 or -5
TT
Related Maths GCSE answers
All answers ▸Work out the value of the following:
Expand and simplify (x-2)(2x-3)(x+1)
Make r the subject of the formula: 1/r -1/p = 1/t
There are 10 boys and 20 girls in a class. The mean mark in a test for all the class is 60. The mean mark for the girls is 54. Work out the mean mark for the boys.