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Mathematics, 25.03.2020 20:28 xojade

If f(x)=5x^2-3 and f(x+a)=5x^2+30x+42, what is the value of a?

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If f(x)=5x^2-3 and f(x+a)=5x^2+30x+42, what is the value of a?...
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