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Question

Find the zeroes of the quadratic polynomial x2+14x+48 and verify them

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Solution

The given polynomial is x2+14x+48
By factorising the quadratic polynomial we get, x2+14x+48=(x+8)(x+6)
The value of x2+14x+48 is zero, When x+8=0 or x+6=0.
That is, when x=8 or x=6
The zeroes of the polynomial x2+14x+48 are 8 and 6.
Let us verify the results by substituting the values.
p(x)=x2+14x+48=(8)2+14(8)+48=64112+48=0p(8)=0
p(6)=(6)2+14(6)+48=3684+48p(6)=0

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