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Two quadratic equations: 16x2 - Ax + 25 and Bx2 + Ax + 4 = 0 have real and equal roots, then what is the value of √B?
  • a)
    15
  • b)
    10
  • c)
    8
  • d)
    20
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Two quadratic equations: 16x2 - Ax + 25 and Bx2 + Ax + 4 = 0 have rea...
16x2 - Ax + 25 has real and equal roots
(-A)2 = 4 * 16 * 25
A = 40
Bx2 + Ax + 4 = 0 has real and equal roots
(A)2 = 4 * B * 4
(40)2 = 4 * B * 4
B = 100
√B = √100
√B = 10
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Two quadratic equations: 16x2 - Ax + 25 and Bx2 + Ax + 4 = 0 have real and equal roots, then what is the value of √B?a)15b)10c)8d)20Correct answer is option 'B'. Can you explain this answer?
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