Question

i) (a+b+c)(a+b)
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Answer 1

Answer:

(a + b + c) (a+ b) = a ( a+ b+ c ) + b ( a+ b + c )

= a ^ 2 + ab + ac + ab + b^ 2 + bc

= a^ 2 + 2 ab + ac + bc + b^ 2

Answer 2

$\huge\bold\red{Hey!}$

$(a + b)(a + b + c) \\ a \times (a + b + c) + b \times (a + b + c) \\ {a}^{2} + ab + ac + ab + {b}^{2} + bc \\ {a}^{2} + {b}^{2} + 2ab + ac + bc \\ {(a + b)}^{2} + ac + bc$