Simplify the expression — task. Mathematics State Board, Class 7.

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Simplify the following using the identity

(x + a) (x + b) = x^{2} + x (a + b) + ab

(a + 3) (a + 8)

\(=\)

i^{i} + i i + i

ii)

(x + 15) (x + 3)

\(=\)

i^{i} + i i + i

[Note: Submit the variable, coefficient, and constant in separate answer field.]

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1. Simplify the expression