To expand (using the distributive property) <u>multiply</u> the number outside the bracket i.e. in this case '2', with the <u>values inside the brackets</u>.
So multiply '2' and 'x' and '2' and 5' and add or subtract on basis of whether the second value is positive or negative.
So
2(x + 5)
= (2*x)+(2*5)
=2x+10
<em>extention note:</em> <u>be careful</u> when the symbol within the equation within the brackets is a subtraction because it implies that the second value would instead be a negative number and should be treated as such.
A) x + y = 2 B) x * y = -8 B) y = -8 / x we can substitute this into equation A A) x + -8 /x = 2 multiplying both sides by "x" A) x² -8 = 2x x² +2x -8 = 0 (x + 4) * (x -2) The 2 numbers are -4 and 2
gcf, hcf, gcd (5; 7) = 1: greatest (highest) common factor (divisor), calculated. Coprime numbers (relatively prime). Numbers have no common prime factors.
