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emmainna [20.7K]
3 years ago
13

Solve the equation for all values of x. (x2 – 16)(x2 + 49) = 0

Mathematics
1 answer:
Black_prince [1.1K]3 years ago
8 0

Answer:

-4, 4, 7i, -7i

Step-by-step explanation:

Basically any or each bracket must be equal to 0. If x^2+16 = 0, then x can be 4 and -4, and if x^2+49 is 0, then x =7i or -7i

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The ratio of pop songs to rock songs you download is 5:4, and 40 are pop songs. You want to find out how many rock songs there are.
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Now you know that pop songs account for 5/9 of the songs, this means that 40 is 5/9 of the total songs. 
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