Question

(a-39)^2=169
find a plz
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Answer 1

Answer:

(a-39)²=169

a² - 78a + 1521 = 169

a² - 78a = 169-1521

a² - 78a = -1352

a² - 78a + 1352= 0

a = (78 +- √6084- 5408)/2

a= (78 +- 26)/2

a= (78 + 26)/2 or a= (78-26)/2

a= 52 or 26

Hope this helps ☺️