solve

'''solve''' function is used to numerically find the real roots of an '''expression''' in a given '''variable'''. It might have two or four arguments

'''solve'''('expression','variable') 

'''solve'''('expression','variable','lower','upper')

[image|3 decimal places|{UP}solve/solvewiki1.png|{UP}solve/solvewiki1.png]

When given two arguments, the roots will be searched in the range given by '''Tools=>Options=>Roots(range)'''. This is very important, if the root is outside that range it will NOT be found.

The precision of root finding depends on the option from the menu
'''Tools=>Options=>Decimal places '''

[image|5 decimal places|{UP}solve/solvewiki2.png|{UP}solve/solvewiki2.png]

'''Increase the number of decimal places for greater precision.'''

HINT: '''solve''' needs an expression and sometimes can fail. For instance, due to the way of calculating integrals in SMath (numerical solving) this can not be solved using '''solve'''

[image|solve failed|{UP}solve/solveint.png|{UP}solve/solveint.png]