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Solve the Following Equation: 3x2 + 25 X + 42 = 0 - Mathematics

Sum

Solve the following equation: 3x2 + 25 x + 42 = 0

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Solution

3x2 + 25 x + 42 = 0

`"x"^2 + 25/3 "x" + 14 = 0`

`"x"^2 + 6"x" + 7/3 "x" + 14 = 0`

`"x"("x" + 6) + 7/3 ("x" + 6) = 0`

`("x" + 6)("x" + 7/3) = 0`

(x + 6) = 0 , `("x" + 7/3) = 0`

x = -6 , x = `-7/3`

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APPEARS IN

Frank ICSE Class 10 Mathematics Part 2
Chapter 6 Quadratic Equations
Exercise 6.1 | Q 8
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