Algebra-1

To expand the expression (−4x−7)(−x²−4x−3) into a polynomial in standard form, we need to multiply each term of the first expression by each term of the second expression and then combine like terms.

(-4x - 7)(-x² - 4x - 3)

Expanding the expression:

= (-4x)(-x²) + (-4x)(-4x) + (-4x)(-3) + (-7)(-x²) + (-7)(-4x) + (-7)(-3)

= 4x³ + 16x² + 12x + 7x² + 28x + 21

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