Question

7. (i)& (ii) tell me

Answer 1

Step-by-step explanation:

1) 51²-49²

(51+49)(51-49)

(100)(2)

200

2)(1.02)²-(0.98)²

(1.02+0.98)(1.02-0.98)

(2)(0.04)

0.08

Answer 2

Answer:

7.

(i) 51²-49²

LET 51=a , AND 49=b

(51+49)(51-49) {a²-b²=(a+b)(a-b)}

100×2

200 (ANSWER)

(ii) (1.02)²-(0.98)²

LET 1.02=a , AND 0.98=b

(1.02+0.98)(1.02-0.98) {a²-b²=(a+b)(a-b)}

2×0.04

0.08 (ANSWER)

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