Question

Please answer this, dont spam i want the correct answer. please

Answer 1

Answer:

9×8²=144

9×2²= 36

144 - 36 = 78

ans is 78 .

Answer 2

Answer:

xy² – xz²= x (y2 – z2) = x (y – z) (y + z)

(i) 9 × 82 – 9 × 22 = 9(82 – 22)

= 9 (8 – 2) (8 + 2) = 9 (6) (10) = 540.

(ii) 40 × 5.52 – 40 × 4.52 = 40 (5.5)2 – (4.52)

= 40 (5.5 – 4.5) (5.5 + 4.4)

= 40 (1) (10) = 400...

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