#### Two positive numbers differ by 5 and square of their sum is 169 are

#### Whole number such that twice of its square added to itself gives 10

#### Factorize 2x²y² + 5xy - 12

#### Factorize x² + 8x + 12

#### If x=3 is solution of x² + kx + 15, value of k is

#### Expansion of (x + 3y)(x - y) gives

#### 39² + 78 + 1 using algebraic identities gives

#### (a + 2b)² - (a + 2b)(3a - 7b) by factorization gives

#### Expansion of 2x(x + 2y) + 3x(2x - 3y) yields

#### 9a² - 4 gives

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