3 years ago

Multiply (4x - 5)(4x + 5).

Mathematics

1 answer:

chubhunter [2.5K]3 years ago

4 0

I think the answer is (B) ?

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Step-by-step explanation:

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1 year ago

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guajiro [1.7K]

Answer:

<u>Option b. (x = 3, y = 20, z = -14)</u>

Step-by-step explanation:

Given:

2x + 2y + 3z = 4

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3x + 4y + 6z = 5

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∴A = $\left[\begin{array}{ccc}2&2&3\\5&3&5\\3&4&6\end{array}\right] = -1$

Ax = $\left[\begin{array}{ccc}4&2&3\\5&3&5\\5&4&6\end{array}\right] = -3$

Ay = $\left[\begin{array}{ccc}2&4&3\\5&5&5\\3&5&6\end{array}\right] =-20\\$

Az = $\left[\begin{array}{ccc}2&2&4\\5&3&5\\3&4&5\end{array}\right] = 14$

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<u>So, the answer is option b. (x = 3, y = 20, z = -14)</u>

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