Find a b a b 4a 5b 4a 5b and a a 2 4 b 2 3Solutiona 2

Find a + b, a b, 4a + 5b, 4a 5b, and a . a = 2, 4 , b = 2, 3

a = 2, 4 , b = 2, 3

All possible combinations of (a, b) would be taken :

(-2, 2) : a+b = 0 ; a-b = -4 ; 4a +5b = -8 +10 = 2 ; 4a - 5b = -8 -10 = -18

(-2, 3) a+b = 1 ; a- b = -5 ; 4a +5b = -8 +15 = 7 ; 4a - 5b = -8 - 15 = -23

(4, 2)\'; a+b = 6 ; a-b = 2 ; 4a+5b = 26 ; 4a -5b = 6

(4, 3) ; a+b = 7 ; a-b = 1 ; 4a +5b = 31 ; 4a -5b = 1