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m4yrajentr7yuale
m4yrajentr7yuale m4yrajentr7yuale
  • 23-05-2016
  • Mathematics
Answered

What are the solution(s) to the quadratic equation x2 – 25 = 0?


A.x = 5 and x = –5

B.x = 25 and x = –25

C.x = 125 and x = –125

D.no real solution

Verified Answer :

apologiabiology
apologiabiology apologiabiology
  • 23-05-2016

difference of 2 perfect squares
a^2-b^2=(a-b)(a+b)
25=5^2
x^2-5^2=(x-5)(x+5)=0
set to zero
x-5=0
x=5
x+5=0
x=-5

x=5 or -5

A

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