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7) $7b^6 + 5b^3 - 6b^2$ 8) $90x^3 - 27x^2 + 18x$ 9) $30x^3y^3 + 6x^3y$ …

Question

  1. $7b^6 + 5b^3 - 6b^2$
  2. $90x^3 - 27x^2 + 18x$
  3. $30x^3y^3 + 6x^3y$
  4. $-20uv^2 + 28uv$

Explanation:

Response
Problem 7: \( 7b^6 + 5b^3 - 6b^2 \)

Step 1: Identify the GCF

The greatest common factor (GCF) of \( 7b^6 \), \( 5b^3 \), and \( -6b^2 \) is \( b^2 \) (since the lowest power of \( b \) is \( b^2 \), and there's no common numerical factor other than 1).

Step 2: Factor out the GCF

Factor \( b^2 \) from each term:
\( 7b^6 + 5b^3 - 6b^2 = b^2(7b^4 + 5b - 6) \)

Step 1: Find the GCF

The GCF of 90, 27, 18 is 9, and the lowest power of \( x \) is \( x \). So GCF is \( 9x \).

Step 2: Factor out the GCF

Factor \( 9x \) from each term:
\( 90x^3 - 27x^2 + 18x = 9x(10x^2 - 3x + 2) \)

Step 1: Determine the GCF

GCF of 30 and 6 is 6. For \( x \): lowest power is \( x^3 \). For \( y \): lowest power is \( y \). So GCF is \( 6x^3y \).

Step 2: Factor out the GCF

Factor \( 6x^3y \) from each term:
\( 30x^3y^3 + 6x^3y = 6x^3y(5y^2 + 1) \)

Answer:

\( b^2(7b^4 + 5b - 6) \)

Problem 8: \( 90x^3 - 27x^2 + 18x \)