Find the value of `((a+b)/(2))^(2)-((a-b)/(2))^(2)`

find the value of (a^(2)-b^(2))

If the side length of regular pentagon is 'a' and diagonals length is 'b' then find the value of (a^(2))/(b^(2))+(b^(2))/(a^(2))

if x_(1),x_(2) are the roots of ax^(2)+bx+c=0, find the value of (1)(ax_(1)+b)^(-2)+(ax_(2)+b)^(-2)(2)(ax_(1)+b)^(-3)+(ax_(2)+b)

Find the value of - (2a+3b) (2a-3b)

If a+b=7 and ab=12, find the value of (a^(2)-ab+b^(2))

If a+b=7 and ab=12, find the value of (a^(2)-ab+b^(2))

If a = 15, b = 12 and c= 9, find the value of sqrt(((2a+2b)(2c+a))/(2(a-b)(2b+c)))

Find the value of ((a+b)^(2))/((b-c)(c-a))+((b+c)^(2))/((a-b)(c-a))+((c+a)^(2))/((a-b)(b-c))

If a+b=7 and ab=12 find the value of a^(2)-ab+b^(2) .

If a+b=7,ab=2 find value of (a)a^(2)+b^(2)=(b)a^(2)-b^(2)=