Factors of a² - 4 are – InterviewSolution

1.	Factors of a² - 4 are
Answer» ong>Answer: a2-4. a2-22. Step-by-step explanation: Theory : A difference of two perfect squares, A2 - B2 can be factored into (A+B) • (A-B) PROOF : (A+B) • (A-B) = A2 - AB + BA - B2 = A2 - AB + AB - B2 = A2 - B2 Note : AB = BA is the COMMUTATIVE property of multiplication. Note : - AB + AB EQUALS zero and is therefore eliminated from the expression. Check : 4 is the SQUARE of 2 Check : a2 is the square of a1 Factorization is : (a + 2) • (a - 2)

Factors of a² - 4 are

Answer»

ong>Answer:

a2-4.

a2-22.

Step-by-step explanation:

Theory : A difference of two perfect squares, A2 - B2 can be factored into (A+B) • (A-B)

PROOF : (A+B) • (A-B) =

A2 - AB + BA - B2 =

A2 - AB + AB - B2 =

A2 - B2

Note : AB = BA is the COMMUTATIVE property of multiplication.

Note : - AB + AB EQUALS zero and is therefore eliminated from the expression.

Check : 4 is the SQUARE of 2

Check : a2 is the square of a1

Factorization is : (a + 2) • (a - 2)

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Factors of a² - 4 are