Question

Using (x+a)(x+b)=x^2+(a+b)x+ab,find
9.7x9.8​

Answer 1

Answer:

95.06

Step-by-step explanation:

9.7x9.8​ = 95.06

The answer can be found by multiplying the two numbers together.

Answer 2

9.7 × 9.8 = (9 +0.7) (9 + 0.8)

Using,

(x + a)(x + b) = x² + (a + b)x+ ab we get,

92 + (0.7 +0.8)9 + 0.7 × 0.8

= 81 + 13.5 +0.56

= 95.06