|4x² - 13| = 7
1) 4x² - 13 = 7 2) 4x² - 13 = - 7
4x² = 20 4x² = 6
x² = 5 x² = 1,5
X₁ = √5 X₂ = - √5 X₃ = √1,5 X₄ = - √1,5
X₁ * X₂ * X₃ * X₄ = √5 * (- √5) * √1,5 * ( - √1,5) = - 5 * (- 1,5) = 7,5
A)6p+8q-9p-3q=6p-9p+8q-3q=-3p+5q
б)7y+(4-2y)-(12+9y)=7y+4-2y-12-9y=7y-9y-2y+4-12=-2y-2y-8=-4y-8
в)2-6(7x+3)=2-6*7x+6*3=2-42x+18=2-18-42x=-16-42x
0,001х⁶-1=(0,1х²-1)(0,01х²+0.1х+1)