Question

Вычислить a)3,7^2-3,6^2
б)(5+0,3)^2

Answer 1

$tt a)quad 3.7^2-3.6^2=(3.7-3.6)(3.7+3.6)=0.1cdot7.3=boxed{tt 0.73}\\b)quad (5+0.3)^2=5^2+2cdot5cdot0.3+0.3^2=25+10cdot0.3+0.09=\\=25+3+0.09=boxed{tt 28.09}$