Ответ:
Объяснение:
2. 1)0,5√1600-1/3√36=0.5*40-1/3*6=20-2=18
2)√0.25*81=0.5*9=4.5
3)√6²2^8=6*2^4=6*16=96
4)√20*√5-√63/√7=√20*5-√63/7=√100-√9=10-3=7
3. 1)x²=2 2)x²=-16 3)√x=4 4)√x=-9
x=-√2, корней нет x=16 x=81
x=√2
4. 1)7√2-3√8+4√18=7√2-3√2*4+4√2*9=7√2-3*2√2+4*3√2=
=7√2-6√2+12√2=13√2
2)(√90-√40)√10=√90*10-√40*10=√900-√400=30-20=10
3)(3√5-2)²=(3√5)²-2*3√5*2+2²=45-12√5+4=49-12√5
4)(2√3+3√5)(2√3-3√5)=(2√3)²-(3√5)²=12-45=-33
5. 1)7√2=√49*2=√98, 6√3=√36*3=√108, 7√2<6√3
2)6√2/3=√36*2/3=√24, 4√3/2=√16*3/2=√24, 6√2/3=4√3/2
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Answers & Comments
Ответ:
Объяснение:
2. 1)0,5√1600-1/3√36=0.5*40-1/3*6=20-2=18
2)√0.25*81=0.5*9=4.5
3)√6²2^8=6*2^4=6*16=96
4)√20*√5-√63/√7=√20*5-√63/7=√100-√9=10-3=7
3. 1)x²=2 2)x²=-16 3)√x=4 4)√x=-9
x=-√2, корней нет x=16 x=81
x=√2
4. 1)7√2-3√8+4√18=7√2-3√2*4+4√2*9=7√2-3*2√2+4*3√2=
=7√2-6√2+12√2=13√2
2)(√90-√40)√10=√90*10-√40*10=√900-√400=30-20=10
3)(3√5-2)²=(3√5)²-2*3√5*2+2²=45-12√5+4=49-12√5
4)(2√3+3√5)(2√3-3√5)=(2√3)²-(3√5)²=12-45=-33
5. 1)7√2=√49*2=√98, 6√3=√36*3=√108, 7√2<6√3
2)6√2/3=√36*2/3=√24, 4√3/2=√16*3/2=√24, 6√2/3=4√3/2