ROVIKULY 3.01 : (x + 5)^2 = ? (problem with solution) [video] [handwritten]

Buy the whole course.

——————————-
Transcript:
Please calculate:
x plus 5, all squared.

FORMULA:
a plus b, all squared,
equals:
a squared
plus 2 ab
plus b squared.

SOLUTION:
x plus 5, all squared,
equals:
x squared
plus 2 times x times 5
plus 5 squared

which equals:
x squared
plus 10x
plus 5.

ANSWER:
x plus 5, all squared, equals:
x squared
plus 10x
plus 5.
——————————-