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Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?

In the diagram, the ratios of two pairs of corresponding sides are equal to prove that almn - axyz by the sas similarity theorem, it also needs to be shown that x 6 z un z zz un = 2x zləzz lezy

When i'm with my factor 5, my prodect is 20 .when i'm with my addend 6' my sum is 10.what number am i