" 19.Using identity "(x+a)(x+b)=x^(2)+(a+b)x+ab," find "5.1times5.2

Using (x+a)(x+b) = x^2 + (a+b)x + ab, find 5.1 x 5.2

Using (x + a) (x + b) = x^2 + (a + b) x + ab , find: 5.1xx5.2

Using (x+a)(x+b) = x^2+(a+b)x+ab find 5.1 xx 5.2

Using the identity (x+a)(x+b) = x^2 + (a+b)x + ab , let's find the product of the following algebraic expression. (a^2 + 5)(a^2 - 4)

Using the identity (x+a)(x+b) = x^2 + (a+b)x + ab , let's find the product of the following algebraic expression. (x+7)(x+1)