given that a+b=7 and ab=12,find the value of 2a(square)b+2ab

given that a+b=7 and ab=12,find the value of 2a(square)b+2ab given that f(x)=2x-3,find the value of f(x+h). given that x=(Sin(2/5))^(-1),find the exact value of 1.(Cosx Given that A is the sum ofthe square of 3 and the square of 一道高数题 Find A and B given that the function f(x) is different 关于相反数.关于opposite number.If |a|=4,|b|=3,a>b,find the value of If cos(a) = 2/3,find the value of cos(4a) Find the minimum value of A=x^2 + y^2 if x + y =10 Find the value of c that satisfy Roll's theorem for f(x)=x^2 a^2-3ab+b^2/ab=( )/ab-3 a^2-3ab+b^2/ab=( )/ab -3 英语翻译The number of standard deviations that a value (x) is ab