Question

Using the formula (a - b)2 = (a? - 2ab + b2), evaluate:
(1) (196)sq
() (689)sq
(iii) (891)sq​

Answer 1

Step-by-step explanation:

(1)

${196}^{2} = (200 - 4)^{2} = {200}^{2} - 2 \times 200 \times 4 + {4}^{2}$

$= 40000 - 1600 + 16 = 38416$

Similarly solve others