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Mathematics

2 answers:

Nezavi [6.7K]3 years ago

8 0

Answer:

$x^{4}$ - x³ - 15x² - 61x - 36

Step-by-step explanation:

Given

(x² - 5x - 4)(x² + 4x + 9)

Each term in the second factor is multiplied by each term in the first factor, that is

x²(x² + 4x + 9) - 5x(x² + 4x + 9) - 4(x² + 4x + 9) ← distribute parenthesis

= $x^{4}$ + 4x³ + 9x² - 5x³ - 20x² - 45x - 4x² - 16x - 36 ← collect like terms

= $x^{4}$ - x³ - 15x² - 61x - 36

____ [38]3 years ago

5 0

Answer:

Check as the pic above showed

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" the sum " means add

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3 years ago

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Find all values of $x$ such that $\sqrt{4x^2} - \sqrt{x^2} = 6$.

artcher [175]

For this case we must solve the following equation:

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To solve we follow the steps below:

We square both sides of the equation squared:

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