1) x = 94
2) y = 218
3) x = 380
4) b = 213
2(2)) x = 345
Пошаговое объяснение:
1)
x + 48 = 94
x = 94 - 48
x = 46
2)
234 + y = 452
y = 452 - 234
y = 218
3)
x - 174 = 206
x = 206 + 174
x = 380
4)
378 - b = 165
-b = 165 - 378
-b = -213
b = 213
2(2))
(208 + x) - 416 = 137
208 + x - 416 = 137
-208 + x = 137
x = 137 + 208
x = 345
16с^2-25d^2 = (4c - 5d)(4c + 5d);
b^2-49a^2 = (b - 7a)(b + 7a);
144a^2b^2-289 = (12ab - 17)(12ab + 17);
c^2-100b^2 = (c - 10b)(c + 10b);
a^2b^2c^2-225 = (abc - 15)(abc + 15);
49a^2c^2-196 = 49•(a^2c^2 - 4) = 49•(ac - 2)(ac + 2);
x^8-y^8 = (x^4 - y^4)(x^4 + y^4) = (x^2 - y^2)(x^2 + y^2)(x^4 + y^4) = (x - y)(x + y)(x^2 + y^2)(x^4 + y^4);
256-81a^4 = (16 - 9a^2)(16 + 9a^2) = (4 - 3a)(4 + 3a)(16 + 9a^2);
625-c^4 = (25 - c^2)(25 + c^2) = (5 - c)(5 + c)(25 + c^2);
Если нет описки в условии, то
29d^2c^2x^2-196 = (√29dcx - 14)(√29dcx + 14);
144a^2-361b^2 = (12a - 19b)(12a + 19b);
36x^2y^2-121 = (6xy - 11)(6xy + 11);
m^2n^2-64 = (mn - 8)(mn + 8);
Пошаговое объяснение:
1)x+48=94; x=94-48; x=46.
2)x-174=206; x=206+174; x=380.
3)234+y=452; y=118;
4)(208+x)-416=137; 208+x=553; x=345