ROVIKULY 2.06 : x^2 – 25 = ? (problem with solution)

Buy the whole book.

——————————-
Transcript:
Please factor:
x square minus 25.

FORMULA:
a squared minus b squared
equals
a plus b times a minus b.

SOLUTION:
x square minus 25
equals
x square minus 5 square.

Which equals
x plus 5 times x minus 5.

ANSWER:
x square minus 25
equals
x plus 5 times x minus 5.
——————————-