0,49a^{8} b^{10} = (0.7 a^{4} b^{5} )^{2}
4a^{4} = (2a)^{2}
16 a^{6} b^{2} = (4 a^{3}b)^{2}
√325^2-300^2=√(350-300)*(350+300)=√50*650=√32500=10√325=10√25*13=50√13