Question
Find the value of:
$(128)^2- (72)^2$
$(128)^2- (72)^2$
✓
Answer
$(128)^2- (72)^2$
$= (128 + 72)(128 - 72)$
$= 200 × 56$
$= 11200$
$= (128 + 72)(128 - 72)$
$= 200 × 56$
$= 11200$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Pluto is $59,1,30,00,000m$ from the sun. Express this in the standard form.
→Factorize of the following expressions: $1 + x + xy + x^2y$
→Factorise: $7 x^2-19 x-6$
→Find the population of a city after 2 yr, which is at present 12 lakh, if the rate of increase is 4%.
Use the distributivity of multiplication of rational numbers over their addition to simplify:$\frac{-5}{4}\times\Big(\frac{8}{5}+\frac{16}{5}\Big)$
→In a town, an ice cream parlour has displayed an ice cream sculpture of height $360\ cm$. The parlour claims that these ice creams and the sculpture are in the scale $1:30$.What is the height of the ice creams served?
→Using suitable identities, evaluate the following. $(35.4)^2- (14.6)^2$
→Can there be a time-temperature graph as follows? Justify your answer.
Using the prime factorisation method, find the following numbers are perfect squares:
$11025$
→$11025$