пжжж оба номера с объяснением даю 30 баллов пжжжжж срочно. Created by mammedovafatima161. matematika-ru

2)( -)( +) + (-)(+) = 13 ()^2 - ()^2 + ()^2 - ()^2 = 13 - + - = 13 = 1313() = 13 * 36 = 363) = 20() - 2ab = 20 - 2ab = 2036 - 2ab = 202ab = 16ab = 8

пжжж оба номера с объяснением даю 30 баллов пжжжжж срочно...

mammedovafatima161 @mammedovafatima161

July 2022 1 3 Report

пжжж оба номера с объяснением даю 30 баллов пжжжжж срочно

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sonyamagonova

2)( $\frac{a}{2}$ - $\frac{b}{2}$ )( $\frac{a}{2}$ + $\frac{b}{2}$ ) + ( $\frac{a}{3}$ - $\frac{b}{3}$ )( $\frac{a}{3}$ + $\frac{b}{3}$ ) = 13

( $\frac{a}{2}$ )^2 - ( $\frac{b}{2}$ )^2 + ( $\frac{a}{3}$ )^2 - ( $\frac{b}{3}$ )^2 = 13

$\frac{a^{2} }{4}$ - $\frac{b^{2} }{4}$ + $\frac{a^{2} }{9}$ - $\frac{b^{2} }{9}$ = 13

$\frac{9(a^{2}-b^{2})+4(a^{2}-b^{2})}{36}$ = 13

13( $a^{2}-b^{2}$ ) = 13 * 36

$a^{2}-b^{2}$ = 36

3) $a^{2} + b^{2}$ = 20

( $a^{2} + 2ab + b^{2}$ ) - 2ab = 20

$(a + b)^{2}$ - 2ab = 20

36 - 2ab = 20

2ab = 16

ab = 8

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