Question

Using Identity (x+a) (x+b)=x^2+(a+b)x+ab find (ii) 3.2×3.4
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Answer 1

Step-by-step explanation:

Using Identity (x+a) (x+b)=x^2+(a+b)x+ab find (ii) 3.2×3.4

3.2×3.4

=(3+0.2)(3+0.4)

=(3)²+3(0.2+0.4)+(0.2)(0.4)

=9+3(0.6)+(0.08)

=9+1.8+0.08

=10.88