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="L(x) = " & ТЕКСТ(B2/((A2-A3)*(A2-A4));"0,00") & "*(x-" & A3 & ")*(x-" & A4 & ") + " & ТЕКСТ(B3/((A3-A2)*(A3-A4));"0,00") & "*(x-" & A2 & ")*(x-" & A4 & ") + " & ТЕКСТ(B4/((A4-A2)*(A4-A3));"0,00") & "*(x-" & A2 & ")*(x-" & A3 & ")"