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Algebraic Identities

822-182=? a 8...

Question

$(82)^{2} - (18)^{2} = ?$
(a) $8218$
(b) $6418$
(c) $6400$
(d) $7204$

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Solution

$(82)^{2} - (18)^{2} = (82 + 18) (82 - 18) = 100 \times 64 = 6400$

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Similar questions

Q. Tick (✓) the correct answer:
(82)² − (18)² = ?
(a) 8218
(b) 6418
(c) 6400
(d) 7204

(82)^{2} - (18)^{2}

Q. Simplify the following using the formula:

(a - b) (a + b) = a^{2} - b^{2}

(82)^{2} - (18)^{2}

(467)^{2} - (33)^{2}

(79)^{2} - (69)^{2}

Q. Find the value of :
(i)

(82)^{2} - (18)^{2}

(128)^{2} - (72)^{2}

197 \times 203

\frac{198 \times 198 - 102 \times 102}{96}

(14.5 \times 15.3)

(8.63)^{2} - (1.37)^{2}

(82)^{2} - (81)^{2}

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