TBQ - Find the value of given square number. — task. Maths CBSE Live product, Class 8 (2025-26).

Can we use \(90^2\) \((= 8100)\) and \(8^2\) \((= 64)\) to find the value of \((\)

90 - 8

\()^{2}\) or \(82^{2}\)?

Answer:

Answer variants:

90^{2} - 2 (90 \times 8)+ 8^{2}

90^{2} + 2 (90 \times 8) - 8^{2}

90^{2} - 2 (90 \times 8) - 8^{2}

(i) Which among the above gives the correct area of the of side length \(82\) units when drawn geometrically?

(ii) Why the square of area \(64\) sq.units is added at the end when solved geometrically?

(iii) The value of \(82^2\) \(=\)

Did you find an error?

8. TBQ - Find the value of given square number.