Question

GIẢI PT GIUP MIK VS >.<

    -4\(\sqrt{3-x}\)+ 30\(\sqrt{x+2}\)= 13x + 30

Answer 1

\(-4\sqrt{3-x}+30\sqrt{x+2}=13x+30\)

ĐK:\(-2\le x\le3\)

\(pt\Leftrightarrow-\left(4\sqrt{3-x}-4\right)+\left(30\sqrt{x+2}-60\right)=13x-26\)

\(\Leftrightarrow-\frac{16\left(3-x\right)-16}{4\sqrt{3-x}+4}+\frac{900\left(x+2\right)-3600}{30\sqrt{x+2}+60}=13\left(x-2\right)\)

\(\Leftrightarrow\frac{16\left(x-2\right)}{4\sqrt{3-x}+4}+\frac{900\left(x-2\right)}{30\sqrt{x+2}+60}-13\left(x-2\right)=0\)

\(\Leftrightarrow\left(x-2\right)\left(\frac{16}{4\sqrt{3-x}+4}+\frac{900}{30\sqrt{x+2}+60}-13\right)=0\)

Suy ra x=2 nghiệm kia khó nuốt quá t gg

Answer 2

trời, sao vế kia giống 1 bài toán khó nx z