Math, asked by sharma8391, 1 year ago

If x equal to minus 2 is the root of equation 3 x square + 7 x + b equal to zero

Answers

Answered by thetripleh123
0

Answer:

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Answered by premmishra35
0

Hey friend,

Here is the solution :-

given \: that \: x =  - 2 \\  \\f(x) =  {3x}^{2}  + 7x + b  = 0 \\  \\ put \: x =  - 2 \\  \\ f( - 2) = 3( - 2)^{2}  + 7( - 2) + b = 0 \\  \\ 3(4) + 7( - 2) + b = 0 \\  \\ 12 - 14 + b = 0 \\  \\  - 2 + b = 0 \\  \\ b = 2

Here we get b = 2.

✨I hope this will help you....✨

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