Question

5. 1) 27^2 - 17^2 16^2 - 6^2 2) 48^2 - 18^2 35^2 - 15^2 3) 87^2 - 43^2 31^2 - 16^2 4) 98^2 - 58^2 75^2 - 35^2 5) 123^3 + 73^3 196 - 123 * 73 6) 186^3 - 34^3 152 + 186 * 34.

Answer 1

Объяснение:

$1) \: \: \: 27 {}^{2} - 17 {}^{2} = (27 - 17)(27 + 17) = 10 \times 44 = 440 \\ 16 {}^{2} - 6 {}^{2} = (16 - 6)(16 + 6) = 10 \times 22 = 220 \\ \\ 2) \: \: \: 48 {}^{2} - 18 {}^{2} = (48 - 18)(48 + 18) = 30 \times 66 = 1980 \\ 35 {}^{2} - 15 {}^{2} = (35 - 15)(35 + 15) = 20 \times 50 = 1000 \\ \\$

$3) \: \: \: 87 {}^{2} - 43 {}^{2} = (87 - 43)(87 + 43) = 44 \times 130 = 5720 \\ 31 {}^{2} - 16 {}^{2} = (31 - 16)(31 + 16) = 15 \times 47 = 705 \\ \\ 4)98 {}^{2} - 58 {}^{2} = (98 - 58)(98 + 58) = 40 \times 156 = 6240$

$75 {}^{2} - 35 {}^{2} = (75 - 35)(75 + 35) = 40 \times 110 = 4400 \\ \\ 5) \: \: \:$