Question

Решите карточку по алгебре

Answer 1

1. a) 9x^2–1=(3x–1)(3x+1)
б) 1/49–16с^2=(1/7–4с)(1/7+4с)
в) –100а^2+b^2=(b–10a)(b+10a)
г) x^2y^2–4=(xy–2)(xy+2)
д) n^4–1/144=(n^2–1/12)(n^2+1/12)
е) x^6–y^8=(x^3–y^4)(x^3+y^4)

2. (21^5–15^2)/18=(21–15)(21+15)/18=
=(6*36)/18=12

3. a) x^2–64=0
x^2=64
x1=8; x2=-8

б) х^2+9=0
х^2=-9
Решения нет