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Reptile [31]
3 years ago
5

..............:") pwees

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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Step-by-step explanation:

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=\begin{pmatrix}\frac{2}{5}&-\frac{1}{5}\\ -\frac{1}{5}&\frac{4}{15}\end{pmatrix}

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