Question

with using suitable identity
9.8 x 9.6​

Answer 1

Answer:

94.08

Step-by-step explanation:

$= (10 - 0.2)(10 - 0.4) \\ = (x - a)(x - b) \\ = {x}^{2} + (a + b)x + ab \\ = {10}^{2} + ( - 0.2 - 0.4)10 + ( - 0.2) ( - 0.4) \\ = 100 + ( - 0.6) \times 10 + 0.08 \\ = 100 - \frac{6}{10} \times 10 \: + 0.08 \\ = 100 - 6 + 0.08 \\ = 100.08 - 6 \\ = 94.08$