Znajdź i popraw błędy :
√98 +√72 = 2√7 + 2√6
( ½ √2 + ¼ √2)² = [2(1+ ½ )] ² = ¼ *2 * (1+ ½ )² = ½ * 9/4 = 9/8
√2( √8 + ¼ √50 ) = √2(2 √2 + 5√2 ) = √2 * √7*2 = √7*2*2 = 2√7
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√98 +√72 = 2√7 + 2√6
√98 +√72 =√2*49 + √2*36 = 7√2 +6√2 2√7 + 2√6
( ½ √2 + ¼ √2)² = [2(1+ ½ )] ² = ¼ *2 * (1+ ½ )² = ½ * 9/4 = 9/8
( ½ √2 + ¼ √2)² =(1/2√2)²+ 2*1/2√2*1/4√2+(1/4√2)² = ¼ *2 +2*1/8*(√2)² +1/16*2=2/4+2/5*2+2/16=2/4+4/8+2/16=
1/2+1/2+1/8=4/8+4/8+1/8=9/8=
√2( √8 + ¼ √50 ) = √2(2 √2 + 5√2 ) = √2 * √7*2 = √7*2*2 = 2√7
√2( √8 + ¼ √50 ) = √2(√2*4 + 1/4*√2*25)=√2(2*√2 +1/4*5√2=√2(2√2 +5/4√2)=√2 (8/4√2 +5/4√2)=√2 * 13/4√2 = 2*13/4=26/4= 6 2/4= 6 1/2