Simplify the expression by combining like terms. -9x + 2y - 7 + 8y + 2x + 20
Please help me

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i

Use pascal's triangle to find the missing values. x4 - 4xb + 6x2 - ax + 1

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