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Differentiate equation = 8x+ 20Set differential to 0 and calculate xx = 2.5

2x² + 6x + 62(x² + 3x + 3) => Factor out 4 from each term so the x² term of the quadratic has 1 for a coefficient.2[(x + 3/2)² - d + 3] => Here, we've div...

Firstly group the like terms to make the expression (5a+4a^2) and then factor out 'a' as it is a common term.This makes the expression ( a(5+4a))

y - 2x = 3 x² + y² = 18Step 1- re-arrange the first formula to find y: y = 3 + 2x Step 2- Substitution: x² + ( 3 + 2x )² = 18 Step 3- Expand the brackets: ( 3 +...

The two terms in the quadratic equation share the factors 2 and x, so these can be brought outside the bracket as shown: y = 2x(3x-2). In order to solve ...