Question

Check whether x=-4 is a solution of x^4+5x^3+6x-7=0

Answer 1

Answer:

Step-by-step explanation: x^4+5x^3+6x-7

256+ [ -320 + -24 =-7 ]

-64-24-7=0

-95 not equal to 0

Answer 2

"x = -4" is not a solution of the given equation.

Step-by-step explanation:

$Given \ equation \ is:\\\\x^4+5x^3+6x-7\\\\and\\\\x=-4\\\\To \ check,put \ the \ value \ of \ "x" \ in \ the \ above \ equation:\\\\Now,\\\\(-4)^4+5(-4)^3+6(-4)-7=0\\\\(256)+5(-64)+6(-4)-7=0\\\\256-320-24-7=0\\\\-95=0\\\\LHS\neq RHS\\\\Hence,x=-4 \ is \ not \ a \ solution \ of \ the \ given \ equation.$

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