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In this section we will discuss about like and unlike terms in solving algebraic expressions.1)In the algebraic expression 5x

Like terms | 5x^{2}y and – 4yx^{2} |

Unlike terms | 7xy^{2} and -3xy |

2)In the algebraic expression a

Like terms | Unlike terms |

a^{2} and - 9a^{2} |
a^{2}and 6ab |

- 3b^{2} and 7b^{2} |
7b^{2} |

3)

Like terms | Unlike terms | Reason |

16x; 16y | Variables are not same | |

x^{2}y ; -7x^{2}y |
- | Variables as well as exponents are same |

- | 9ab ; - 6b | 1st term contains ab and 2nd term contains 'b' only |

(Q.1) Sate whether a given pair of terms is of like or unlike terms.

(a) 23, 203

(b) 12mn, 12m

(c) 3pr

(d) 2x, 3y

(e) 14ab, 21ab

(f) –3x, x

(g) 4x

(h) -2a

(i) 12, 13a, -1/2b, a, -1/2

• Like and Unlike terms in Algebra

• Addition of algebraic expressions

• Subtraction of algebraic expressions

• Multiplication of algebraic expressions

• Division of Algebraic Expressions

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