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Subjects
Mathematics State Board
Class 7
Algebra
Factorization Using Identities
1.
Choose the correct answer
Exercise condition:
2
m.
Choose the right identity
:
If the expression is
\(r^2 + 17r + 72\)
, the which identity will you use to find its factors?
\((a - b)^2 = a^2 - 2ab + b^2\)
\((x + a)(x + b) = x^2 + x(a + b) + ab\)
\((a + b)^2 = a^2 + 2ab + b^2\)
\((a + b)(a - b) = a^2 - b^2\)
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