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Ƒ(x) = −x² + 10x − 20; Find ƒ(4)
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Ƒ(x) = −x² + 10x − 20; Find ƒ(4)

User Jdp
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F(4) subs the x in the equation so -4^2+ 10(4) -20. which turns into 16+40-20 = 36.
User GMalc
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