144 x square —64y square
Answers
Answer:
STEP
1
:
Equation at the end of step
1
:
(144 • (x2)) - 26y2
STEP
2
:
Equation at the end of step
2
:
(24•32x2) - 26y2
STEP
3
:
STEP
4
:
Pulling out like terms :
4.1 Pull out like factors :
144x2 - 64y2 = 16 • (9x2 - 4y2)
Trying to factor as a Difference of Squares :
4.2 Factoring: 9x2 - 4y2
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 : 9 is the square of 3
Check : 4 is the square of 2
Check : x2 is the square of x1
Check : y2 is the square of y1
Factorization is : (3x + 2y) • (3x - 2y)
Final result :
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