((-b) - a) * ((-b) + a) = (-b)² - a² = b² - a²
Ответ:
а) 2 : 5 * 100% = 40%;
б) 18 : 22 * 100% = 81.(81)% ≈ 81.8%.
(-9-57)*(48 – 60)=792<span>
(34 – (-5))*(-57+30) =-1053</span><span>
( -32 -11)*(-5-(-11))=-258
</span><span>(-15+28)*(-13-(-14)) =13
</span>(34-(-51)):(95-78) =-1
<span>(-28-(-49)):(47-68) =-1</span>
<span>(58-85):(45-54) =3</span>
<span>(-42-24): (18-51)=2</span>
85%, 44%, 42%, 5%, 74%, 150%, 160%, 212%. вроде так...
1) 10 = 1*5*2*1
2)1512 : 12 = 126
ответ: 1512