Answer:
15=225
20= 400
Step-by-step explanation:
the small 2 means multiply that number two times :)
[tex]15^2\\[/tex] = 225
[tex]20^{2}[/tex] = 400
[tex]x^{2}[/tex] = [tex]x[/tex] × [tex]x[/tex]
basically it's the number times itself
15 × 15 = 225
20 × 20 = 400
