Question

Evaluate 20.7 square using the identity a square minus b square

Answer 1

Step-by-step explanation:

20.7 can be written as

20+0.7

now by identity (a+b)^2=a^2+2ab+b^2

=. || =20^2+2×20×0.7+0.7^2

=400+40×0.7+4.9

=400+28+4.9

=432.9

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Answer 2

Answer:

$8xy25522y {52 \times 2 + { {26. = }^{2} }^{2} }^{?}$