3, tim x, biet ;

a,\(3x\left[12x-4\right]-9x\left[4x-3\right]=30\)

b,\(x\left[5-2x\right]+2x\left[x-1\right]=15\)

Phân tích thành nhân tử

a. \(\left(x^2+8x+7\right)\left(x+3\right)\left(x+5\right)+15\)

b. \(\left(4x+1\right)\left(12x-1\right)\left(3x+2\right)\left(x+1\right)-4\)

c. \(\left(x+5\right)\left(x+6\right)\left(x+10\right)\left(x+12\right)-3x^2\)

tim x

a) 2.\(3^x\) =162

b) \(\left(7\times x-11\right)^3=2^5\times5^2+200\)

c) \(\left(2\times x-15\right)^5=\left(2\times x-15\right)^3\)

Phân tích thành nhân tử:

a) \(B=\left(4x+1\right)\left(12x-1\right)\left(12x-1\right)\left(x+1\right)-4\)

b) \(C=\left(x^2+x\right)^2-2\left(x^2+x\right)-15\)

c) \(D=\left(x^2+2x\right)^2+9x^2+18x+20\)

d) \(E=\left(x^2+3x+1\right)\left(x^2+3x+2\right)-6\)

e) \(F=\left(x^2+8x+7\right)\left(x+3\right)\left(x+5\right)+15\)

Phân tích đa thức thành nhân tử:

a) \(A=\left(4x+1\right)\left(12x-1\right)\left(12x-1\right)\left(x+1\right)-4\)

b) \(B=\left(x^2+x\right)^2-2\left(x^2+x\right)-15\)

c) \(C=\left(x^2+2x\right)^2+9x^2+18x+20\)

d) \(D=\left(x^2+3x+1\right)\left(x^2+3x+2\right)-6\)

e) \(E=\left(x^2+8x+7\right)\left(x+3\right)\left(x+5\right)+15\)

phân tích đa thức thành nhân tử:

a. \(ax^2-a^2x-x+a\)

b. \(18x^3-12x^2+2x\)

c. \(x^3-5x^2-4x+20\)

d. \(\left(x+7\right)\left(x+15\right)+15\)

giải pt:

a,\(\left(13-4x\right)\sqrt{2x-3}+\left(4x-3\right)\sqrt{5-2x}=2+8\sqrt{-4x^2+16x-15}\)

b,\(\left(9x-2\right)\sqrt{3x-1}+\left(10-9x\right)\sqrt{3-3x}-4\sqrt{-9x^2+12x-3}=4\)

c, \(\left(6x-5\right)\sqrt{x+1}-\left(6x+2\right)\sqrt{x-1}+4\sqrt{x^2-1}=4x-3\)

Giaỉ các PT:
a) \(\left(x^2+1\right)^2=4\left(2x-1\right)\)

b) x(x+1)(x+2)(x+3)=24

c)\(\left(12x+7\right)^2\left(3x+2\right)\left(2x+1\right)=3\)

d)\(\left(x^2-9\right)^2=12x+1\)

e)\(\left(x-1\right)^5+\left(x+3\right)^5=242\left(x+1\right)\)

Giup mk vs mn

\(\left|x\right|-5\frac{3}{7}\left|x\right|-\frac{3}{4}=2\left|x\right|+\left(-\frac{8}{7}\right)\)

Tim x