Simplify the equation 2x^3 . 3x^2

There are two parts to this expression, the coefficients and the powers of x, and they can be addressed separately.It's important to remember the rules of indices - am x an = am + nAlso remember that 2x3 is just 2 times x3With this in mind we can break the equation into (2 X 3) x (x3 X x2) which gives us 6 X x5 = 6x5

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Solve for x and y using these simultaneous equations: 2x + 3y = 21, y = 2x - 1


Simplify fully:6y2 +7y - 6y - 4 - 3y2


11(x+3)=121