math 30 pure

determine the zeros(to the nearest tenth) and the domain and range:
y=-2x+4

and

y=-x2(squared) - 3x - 4

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  1. y is zero , so 1) x=2 domain all real x, range all real numbers

    2) y=-(x-3)(x+1) pr roots x=3, or x=-2

    domain all real numbers.
    range: -inf to -2.25 check that.

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