If (a + b) ^ 2 (a-b) = 7, the value of AB is equal to? If (a + b) ^ 2 = 11 (a-b) = 7, the value of AB is equal to?

If (a + b) ^ 2 (a-b) = 7, the value of AB is equal to? If (a + b) ^ 2 = 11 (a-b) = 7, the value of AB is equal to?

(a+b)^2=11 a^2+2ab+b^2=11…… one
a-b=7 a^2-2ab+b^2=49…… two
Formula 1-2 leads to 4ab=-38
ab=-19/2