Ответ:
Объяснение:
123. 1. x²-4=(x-4)(x+4);
2. 25-9a²=(5-3a)(5+3a);
3. 36m²- 100n²=(6m-10n)(6m+10n);
4. 0.04p²-1.69q²=(0.2p-1.3q)(0.2p-1.3q);
5) x²y² -4/9=(xy-2/3)(xy+2/3);
6) a⁴-b⁶=(a²-b³)(a²+b³);
7) 0.01c²-d⁸=(0.1c-d⁴)(0.1c+d⁴);
8) 0.81y¹⁰-400 z¹²=(0.9y⁵-20z⁶)(0.9y⁵+20z⁶);
9) -1 +49 a⁴b⁸=49a⁴b⁸-1=(7a²b⁴-1)(7a²b⁴+1);
10) 1 7/9m²n² - 1 11/25a⁶b²=16/9 m²n² - 36/25 a⁶b² =(4/3mn-6/5a³b)(4/3mn+6/5a³b);
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124. 1) (3b-5)² -49=(3b-5-7)(3b-5+7)=(3b-12)(3b+2);
2) (2x-3)²-(x+4)²=(2x-3-x-4)(2x-3+x+4)=(x-7)(3x+1);
3) a⁴-(a-7)²=(a²-a+7)(a²+a-7);
4) (a-b+c)² -(a-b-c)²=(a-b+c-a+b+c)(a-b+c+a-b-c)=2c(2a-2b)=2(c(a-b)).
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Answers & Comments
Ответ:
Объяснение:
123. 1. x²-4=(x-4)(x+4);
2. 25-9a²=(5-3a)(5+3a);
3. 36m²- 100n²=(6m-10n)(6m+10n);
4. 0.04p²-1.69q²=(0.2p-1.3q)(0.2p-1.3q);
5) x²y² -4/9=(xy-2/3)(xy+2/3);
6) a⁴-b⁶=(a²-b³)(a²+b³);
7) 0.01c²-d⁸=(0.1c-d⁴)(0.1c+d⁴);
8) 0.81y¹⁰-400 z¹²=(0.9y⁵-20z⁶)(0.9y⁵+20z⁶);
9) -1 +49 a⁴b⁸=49a⁴b⁸-1=(7a²b⁴-1)(7a²b⁴+1);
10) 1 7/9m²n² - 1 11/25a⁶b²=16/9 m²n² - 36/25 a⁶b² =(4/3mn-6/5a³b)(4/3mn+6/5a³b);
***
124. 1) (3b-5)² -49=(3b-5-7)(3b-5+7)=(3b-12)(3b+2);
2) (2x-3)²-(x+4)²=(2x-3-x-4)(2x-3+x+4)=(x-7)(3x+1);
3) a⁴-(a-7)²=(a²-a+7)(a²+a-7);
4) (a-b+c)² -(a-b-c)²=(a-b+c-a+b+c)(a-b+c+a-b-c)=2c(2a-2b)=2(c(a-b)).