Solve the following equation for x. 5x−46=2+3x2
- 3
2
4
- 4
The given equation is 5x−46=2+3x2 By taking the LCM on RHS, we get ⇒5x−46=4+3x2 On cross multiplying, ⇒2(5x−4)=6(4+3x) ⇒10x−8=24+18x ⇒10x−18x=24+8 ⇒−8x=32 ⇒x=−328 ⇒x=−4
Find and correct the errors in the following mathematical statements:
i.)Substituting x= -4 in x2+6x+4 gives (−4)2;+ 6(-4) + 4 = 16-24+4 = -4
ii.) 3x/(3x+2) = ½