simplify the expression and find its value when `a=5 and b=-3, 2(a^(2)+9b)+7-9b`

Simplify the expression and find its value when a=5 and b=-3 2(a^2+ab)+3-ab

Simplify the expression and find its value when a=5 and b=-3 then 2(a^(2)+ab)+3-ab

Simplify the expression and find its value when a =5 and b=-3 then 2(a^2+ab)+3-ab

Simplify the expression and find its value when a = 5 and b = – 3. 2(a^2 + ab) + 3 – ab

Simplify the following expression and then find its value when a = 2 and b = - 1 : 2(a^(2) - b^(2)) - [ 2a^(2) - { b^(2) - (a^(2)+b^(2) +ab)}]

Simplify these expressions and find their values if x=3, a-1 and b=-2 (i) 3x-5-x+9

Simplify these expressions and find their values if x=3,a-1 and b=-2(i)3x-5-x+9

Simplify these expressions and find their values if x=3,a=-1,b=-2: 3x-5-x+9