Algebra
# Quadratic Equations

Which of the following is the expansion of

\[x(x+4)? \]

Which of the following is the expansion of

\[(x+3)(x+4) ? \]

It is given that

\[ ( 3x+9)(6x+8) = Ax^2 + Bx + C \]

is an algebraic identity. What is the value of \(B\)?

Simplify

\[(3 x^2 + x - 4)+(6 x^2 - 9x + 2). \]

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