Use the quadratic formula to solve the equation.x2 + 14x + 85 = 0
A. {-7 + 6i}
B. {-7 - 36i, -7 + 36i}
C. {-7 - 6i, -7 + 6i}
D. {-13, -1}
Answer: C
Mathematics
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A. 291 B. 290 C. 290.20
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Write the number in scientific notation.154,000
A. 1.54 × 105 B. 1.54 × 10-1 C. 1.15400 × 103 D. 4.620 × 105
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Multiply and write the result in standard form.(2 + 10i)2
A. 104 + 40i B. -96 + 40i C. 4 + 100i D. 4 - 100i
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Find det A using the method of cofactors.A = 
A. -78 B. -2 C. 2 D. 14
Mathematics