Question

$(32.51{)}^2-(17.45{)}^2=?$

• A. 780
• B. 850
• C. 680
• D. 820
• E. 750

Answer 1

The correct option is E 750

Here, the given expression can also be written as
$(32{)}^2-(17{)}^2=?$
or ? =(32+17)(32-17)
or ?$=\left(49\right)\times 158$
or ?$=50\times 15$
or ?=750