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whether the values oliven in each case are the zeroes of the policial3. Verify whether theo pls) = 2x+lix -(1) P(x) - r- 1 - 1(1) Po)= y; x=0(6) Px) = 5x - 1;(iv) p(x) = (x - 1)*+ 27, x=-1,-2.(vi) p) - ax+b: x(vi) Ac)- 3x?-1: --(vi) f(x) = 27-1, |
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Answer» p(x)=2x+1,; x=-1/2; p(-1/2)=2(-1/2)+1=0; p( x)=5x-x ; x=(-3/2); p(-3/2)=5(-3/2)-(3/2)=-15/2-3/2=-18/2=-9,; (iii)p(x)= x^2-1; x=+-1; p(+-1)= x^2-1=(+-1)^2-1=1-1=0; 1-1=0; (iii) p(x)=( x-1)( x+2);; x=-1, -2; p(-1)=( -1-1)(-1+2)=(-2)(1)=-2, p(-2)=(-2-1)(-2+2)=(-3)(0)=0; p(x)=y^2; y=0; p(0=(0)^2=0; (v) (vi)p(x)=ax+b; x=-b/a; p(-b/a)=a(-b/a)+b=-b+b=0; f(x)=3x^2-1; x=-1/V3, 2/V3, ; f(-1/V3)=3(-1/V3)^2-1=3(-1/3)-1=-2, f(2/V3)=3(2/V3)^2-1=3(4/3)-1=4-1=3 |
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