Answer:
Yo, check this out, S=a×a=a², the formula to find the area of a square.
Step-by-step explanation:
S=49 yd²
S=a×a=a²
a²=49===> √a²=√49 yd²===> |a|=7 yd===> a=7, –7
but be aware that we ain't got no squares with a negative length, so the answer is
7 yd
