Question

Check whether –2 and 2 are zeroes of the polynomial 2x + 4

Answer 1

2x+4 = 0

when x= -2

2x+4= -4+4 =0 ✓

when x= +2

2x+4= 4+4 is not equal to 0

so only -2 is zeroe of the polynomial 2x + 4

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Answer 2

★Question:-

=> Check whether -2 and 2 are the zeroes of the polynomial 2x + 4 .

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★Solution:-

⠀

†Given polynomial:-

• 2x + 4

⠀

➠ Taking the value of x = -2 and 2:-

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Case I =>

• p(x) = 2x + 4
• p(-2) = 2 × (-2) + 4
• ⠀⠀⠀= -4 + 4
• ⠀⠀⠀= 0

⠀

•°• -2 is the zero of the given polynomial.

⠀

Case II =>

• p(x) = 2x + 4
• p(2) = 2 × 2 + 4
• ⠀⠀⠀= 4 + 4
• ⠀⠀⠀= 8 ( ≠ 0 )

⠀

•°• 2 is not the zero of the given polynomial.

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♠ Hence :-

• Only -2 is the zero of the given polynomial.

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