Oblicz:
√18 - √8 + √98=
o,2√50 + 0,8√72 - 0,3√32=
√18 - √8 + √98= √ 108
=√9*√2 - √4*√2 + √49*√2 =
= 3√2 - 2√2 + 7√2 =
= √7(3 -2 +7) =
= 8*√7
= 0,2*√25*√2 + 0,8*√36*√2 - 0,3*√16*√2 =
= 0,2*5*√2 + 0,8*6*√2 - 0,3*4*√2 =
= 1*√2 + 4,8*√2 - 1,2*√2 =
= √2*( 1 + 4,8 -1,2) =
= √2* 4,6=
= 4,6*√2
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√18 - √8 + √98= √ 108
Oblicz:
√18 - √8 + √98=
=√9*√2 - √4*√2 + √49*√2 =
= 3√2 - 2√2 + 7√2 =
= √7(3 -2 +7) =
= 8*√7
o,2√50 + 0,8√72 - 0,3√32=
= 0,2*√25*√2 + 0,8*√36*√2 - 0,3*√16*√2 =
= 0,2*5*√2 + 0,8*6*√2 - 0,3*4*√2 =
= 1*√2 + 4,8*√2 - 1,2*√2 =
= √2*( 1 + 4,8 -1,2) =
= √2* 4,6=
= 4,6*√2