Television A=w *l=w* 5w=5w² w=x+7, x- width of tablet A=5(x+7)²=5(x²+14x+49)= 5x²+70x+245 A(television)=5x²+70x+245 "at least" means more or equal,so 5x²+70x+245≥1,050 - the answer
If tablet has width 8, x=8, then 5*8²+70*8+245≥1050 1125≥1050 True, so we can say Yes, 8 in is a reasonable size for Adrew's tablet.
