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Can you solve x squared minus 4x minus 21 equals 0? - Answers

x2-4x -21 = 0(x-7)(x+3) = 0x = -3 or x = 7Alternatex2 - 4x - 21 = 0per quadratic formulax = (-b ± (b2 - 4ac )(1/2)) ÷ 2ax = (+4 ± (42 - 4*1*(-21))(1/2)) ÷ 2*1x = (+4 ± (100)(1/2)) ÷ 2x = (+4 ± 10) ÷ 2x = (+2 ± 5)x = -3 ^ x = +7



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Can you solve x squared minus 4x minus 21 equals 0? - Answers

https://math.answers.com/math-and-arithmetic/Can_you_solve_x_squared_minus_4x_minus_21_equals_0

x2-4x -21 = 0(x-7)(x+3) = 0x = -3 or x = 7Alternatex2 - 4x - 21 = 0per quadratic formulax = (-b ± (b2 - 4ac )(1/2)) ÷ 2ax = (+4 ± (42 - 4*1*(-21))(1/2)) ÷ 2*1x = (+4 ± (100)(1/2)) ÷ 2x = (+4 ± 10) ÷ 2x = (+2 ± 5)x = -3 ^ x = +7



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https://math.answers.com/math-and-arithmetic/Can_you_solve_x_squared_minus_4x_minus_21_equals_0

Can you solve x squared minus 4x minus 21 equals 0? - Answers

x2-4x -21 = 0(x-7)(x+3) = 0x = -3 or x = 7Alternatex2 - 4x - 21 = 0per quadratic formulax = (-b ± (b2 - 4ac )(1/2)) ÷ 2ax = (+4 ± (42 - 4*1*(-21))(1/2)) ÷ 2*1x = (+4 ± (100)(1/2)) ÷ 2x = (+4 ± 10) ÷ 2x = (+2 ± 5)x = -3 ^ x = +7

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      x2-4x -21 = 0(x-7)(x+3) = 0x = -3 or x = 7Alternatex2 - 4x - 21 = 0per quadratic formulax = (-b ± (b2 - 4ac )(1/2)) ÷ 2ax = (+4 ± (42 - 4*1*(-21))(1/2)) ÷ 2*1x = (+4 ± (100)(1/2)) ÷ 2x = (+4 ± 10) ÷ 2x = (+2 ± 5)x = -3 ^ x = +7

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